Probably a good idea to avoid that hardware. I installed it on my old trusty Dell Inspiron 6000, and can't get a video driver to load at all. This is making it very hard to play with. Win 7 works great once you get the drivers from the MS update catalog.
I'm definitely not liking the start menu/metro. For a desktop experience it is too clunky. So many extra motions/clicks to do simple things that shouldn't require them. Right now if I want to run cmd.exe I'll hit the windows key, type in cmd and hit enter. Now it's move the mouse to the bottom corner, select search, then I can type in cmd. But if I want to run it as admin... too many clicks.
I'm hoping that although they haven't said it, that this build is much more aimed at tablets, and getting developers writing Metro (or tablet/phone) applications. Hopefully in a few months we'll see a full public beta that will show us how they plan to manage devices using a keyboard/mouse interface.