Bethesda released their official HD textures for Skyrim, it was a good move especially for people who didn't want to bother tempering with folder files to get community-made ones (of course mods were better, but not everyone wants to bother with them). I suppose that they will do the same for Fallout 4 at some point. My 'problem', if any, is that we always have to wait for such textures with Bethesda games. The engine is indeed very old, but good textures can still be made for the game from either the devs or the community (well, that one is guaranteed to happen obviously).
Anyway, if those pictures posted above were indeed taken from the PC version (at max settings I suppose) then I find them 'alright', for the time being. It's nothing horrendous, especially not considering it's... well... it's a Bethesda game (we should all have expected it from them, I'm very surprised by some of the negative reactions around, Bethesda ain't CryTek or CDPR), and it's using that old engine again (heck I'm surprised DOOM wasn't made with gamebryo, they can't get enough of that engine).
Honestly though, it looks at least decently better than Skyrim at release (vanilla, non-modded). And just like all previous Bethesda games it will only get better, much better over time. The main issue is indeed the waiting until it gets there. It usually takes about a full year after release to be in a state where you can choose from multiple mods from all categories, including Unofficial patches, Utilities, new UIs, etc. If any of you guys genuinely feel disgusted by the default (even maxed out) graphics then just wait, really. Just be patient, save your money, and maybe keep an eye occasionally, once every month or so after release and browse the Nexus / Workshop and see what's being worked on by the community and read official patch notes to see what got fixed/changed/added, etc. And about 10 to 12 months later just get it for much cheaper, maybe even with a DLC or two included in some GOTY edition or in a Steam sale.
The 'situation' about Fallout 4's graphics really isn't different from Skyrim's at release (on the PC). I clearly remember people around complaining about how Skyrim's default textures looked bad (and honestly they weren't 'bad' in my eyes, but they could have been noticeably better of course). Then the "rage" about it faded away after about a month, mods started to come out, word of mouth and media on the web spread about how it "now" looked better thanks to mods, more people tried it, found out it was finally "better" and then Bethesda followed with their official HD pack (and then the community complained about that pack anyway and how 'x' and 'y' texture sets weren't touched or remained uncompressed or stuff like that).
Just wait if you're pissed about the graphics, and just buy it if you simply want to play a typical Bethesda-flavored exploration-based game (and that's fine by me, couldn't wait to go back in the Fallout world again).