That's a good point, I haven't been too forward thinking with this, I did read quite a bit about SCART/RGB and the Sony PVM. I sort of want a Sony PVM, just the massive amount of room it takes up in the area I'm probably putting this setup might not work.
Sometimes the more you think about something, the more chance it happens. I just found another hi-def NES, so I'll be making Christmas presents out of these. Really awesome.
It's difficult to find OEM Old Stock NEW NES controllers for cheap. There's one on ebay for $50 (new), and hong kong has them for $28 but slow shipping.
My main problem with going to extreme lengths for an RGB setup is that many PVMs and RGB displays are already failing, the ones that aren't will fail eventually and will be even harder to replace in the future, all while S-Video and Component provide most of the same improvement for many more easily-available TVs.
Every time someone poo-poos someone for desiring S-Video or component just because RGB is possible ("what's the point when you can have RGB?!"), I think about how even Jason from Game-Tech.us (the installer working with Kevtris on the Hi-Def NES) installs a ton of RGB mods and yet even he doesn't seem to have properly working RGB PVM (purple shift) and the end users still don't have an improved output that they can connect to a large traditional CRT TV (few RGB displays are over 21"). Kevin also had a bad RGB display he tried to fix. Even if you happen to get a good one, good luck getting replacing it 10, 15, 20 years from now.
I imagine that most of Jason's clients are running theirs on a tiny modded PSone LCD, a small PVM under 15", an arcade cabinet, a similarly bad/failing RGB CRT, or are only doing it for improved video capture (Twitch, YouTube, etc). Even if they have a perfectly working 19" PVM (about the largest I regularly see) and they are perfectly OK with connecting all their consoles to it, does that really belong front and center where a TV should go in a living room/game room/man cave? Sounds like a private bedroom setup to me. Sorry, but "the best" isn't always the most appropriate.
Though few would agree with me, I'd S-Video mod most consoles before I'd RGB mod one (like SNES2). If the Hi-Def NES didn't exist, I'd be one of the ones adding a "pointless" Component circuit to an NES RGB. With S-Video/Component I don't need a Framemeister to connect it to various TVs in much higher quality than the original Composite/RF. That's important to me.
It still bugs me when people say S-Video is hardly any better than Composite and that it only makes sense if you move up to something better, like Component/RGB. I strongly disagree. If you want to talk about diminishing returns for your effort, I've done enough comparisons to know that the difference in perceived pixel sharpness and text readability between Composite and S-Video is MUCH greater than the difference between S-Video and Component. S-Video improves things greatly on old TVs that don't even have Component and still looks closer to Component than Composite on a TV that's capable of both.
In 2003 I connected my GameCube to my Sony XBR910 with Composite, S-Video, and Component using a rare cable that was stolen from me a few months later. I eventually obtained another so I can repeat the test today. Last I checked this was still the highest image quality rating of any television ever made (Sony SFP CRT). First I tested Composite, then I tested S-Video and the difference in text readability and pixel detail was impressive. Then I switched to 480i Component and had trouble seeing any difference.
I was able to output both simultaneously, switch back and forth, and use Split View to see both side-by-side. When I enabled 480p Component it looked like the resolution was halved (may have lost temporal resolution enabled by scanlines). The pixels were perfectly sharp but the tiny little squirrel on the 1080 Avalanche title screen was now just an unrecognizable blob of perfectly sharp pixels. Switching back to 480i with scanlines completely resolved this. The squirrel looked like a squirrel again.
I don't know how much of it might have been the TV's image processing (impossible to disable) but the fact remains that S-Video and Component were almost indistinguishable at 480i and the biggest leap BY FAR was the jump from Composite to S-Video. I got that $2,300 TV in particular because other ~$800 widescreen CRTs would force enhanced or hi-def sources to 16:9, stretching/distorting 480p games with no 16:9 mode (like Metroid Prime). I guess the XBR image processor is what allowed aspect adjustment in ED/HD, but it also caused
strange artifacts in 480p Wind Waker. With newfound respect for S-Video and scanlines, I mostly stuck with Component in 480i mode until the Wii came along (no artifacts there).
Like many S-Video mods, many RGB mods are hackish with dark video, incorrect colors, etc but with the additional issue of not improving anything on the vast majority of non-RGB-capable TVs. Considering that a Funtastic N64 with native S-Video can look better than a RGB-modded NS1 N64, I'd say that it's often a lot of wasted effort for a console that already has native S-Video (Funtastic always had better Composite output but they only recently became RGB mod-able; though natively RGB inside, NS1 models are no longer highly sought after due to inferior video quality).
By all means, add RGB to a console that doesn't have S-Video but consider adding S-Video or Component while you are at it so that you can enjoy improved image quality on many more televisions and future-proof it. Even when modern TVs stop including S-Video or Component inputs and you have to resort to some kind of adapter there are going to be many more options for S-Video and Component than there are for RGB.