Based on the little we know so far about W8 I like it a lot.
There are two things that concern me though:
Will it be possible to tilt the screen with all the live titles or will it be locked in "Landscape" mode as WP7?
I use "Real" Tablets since they launched in 2002 and be able to use the computer in the "Portrait" mode is very important, at least for me.
My second concern is what will happen with "Ink" capabilities; since it was launched this input method has improved tremendously but with all this emphasys on "Touch" I am worrying that it could be abandoned and this would be a terrible mistake.
Time will tell but I really hope that MS will address these issues sooner than later.