That "I see what you're looking for: I'll find it for you" thing is very good, isn't it!
I installed RC1 on a new hard drive in my Thinkpad laptop. First time through, it said it had some problems with some of the hardware. Then it went off and found the drivers for the fingerprint recognition, the Thinkpad keys, and the strange LAN/WiFi stuff. The two printers (HP Laser, Canon colour inkjet) connected to the desktop and "shared" on the network it sorted "on the fly".
Everything is now up and working, and a lot faster than XP Pro, too.
What impressed me most was when I was trying to get some OCR software to work on the desktop. My prehistoric and very expensive ex-work 1990s vintage OCR won't work with Win 7 (it just did, with XP). I downloaded a couple of freebies to try, both of them pretty useless. Then it asked "I see you're trying to set up OCR. Would you like me to do it for you?" And it did! Win7's inbuilt one, which also recognised my antique scanner and found drivers for it.
I'm very impressed.
Anyone know what the price of Win 7 Ultimate released version is likely to be? I've seen Vista Ultimate at under £100 (upgrade version) and around £400 ("new" install).