I run XP pro on my laptop and Vista SP1 on my desktop.
Just installed windows 7 (64bit clean install)into the desktop and have to say very impressed upto now. Runs smooth I say better than XP Pro SP3 and Vista SP1. I just love the layout, made a few tweeks and just love it up to now.
The only prob I had is I couldn't get the drivers for my Soundblaster XtremeMusic sound card, using the internal one now and have to say can't really tell the diference.
Very easy to use after about an hour of looking about.
...So far, all that stuff in control panel regarding touch screens etc, shows us the way they are thinking here. It boot's faster than Vista (on this machine it's as quick as XP pro) but remember, it's a BETA....Call me cynical if you like, but I bet the final code gets much, much bigger and slower.