I think I, and most of the people on these forums, are very "tech savvy". Like I said in my other post, I can see the usefulness of Metro on a laptop or tablet. But do you really want to lean over your desk and scrunch up within touching distance of a 27 inch monitor?
Considering I don't have a touchscreen monitor, that would be a waste of effort to even do such.
Considering this is a single OS, and seeing it will be beneficial on a few devices, it is great. Also of note, if you have such devices, you can instantly get into the same exact apps, do the same things, and have the data and settings completely synced and ready to roll in the Metro apps, regardless of what device you are using at that particular moment.
If you have a PC and only a PC, I can imagine this will be a pain in the ass. Hell, I imagine some devs will try and make cross-platform services that sync across portables, regardless of which OS one uses, so that could be great as well.
That, and sometimes the clean, simple interface of Metro, I imagine, will be nice to use if you simply want to check something and get back to what you were doing. Live Tiles are amazing for just that thing - check the start screen, see the data you want, without clicking a thing, then back to the desktop app you were using.
A lot of us are also very unfamiliar with the entire concept of Metro (my only experience being Zune and what I've read of it in regards to Win Phone 7 and now Win8), so we've all got to learn the new time-saving tricks that Metro has that we've never experienced before. How to get to things quickly, some of us know in Windows (desktop), but in Metro we are at a loss, and wasting time. And Metro will probably get some tweaks in that regard, hopefully for Win8's release but, if not, then for whatever gives us Metro v2.
There is certainly a lot Metro has to offer us, but many are, so far, seeing it as "removing features we loved" and "ridiculous and requiring more effort to get to what we want" ... yet there are things that can and are accomplished with less effort inside of Metro (compared to "desktop" style Windows). A lot of the hate right now is exactly like Vista hate, but in a different way.
Shitty driver experience with Vista gave people a bad taste, and many repeated the opinions of others without ever touching it, or with having experience that only showed them how things changed without seeing actual stability/usefulness. I loved Vista, and 7 is even better (and even more stable). I think Windows 8 also uses a 6.x kernel, so that should at least be good for drivers/stability (on the Intel side).