Well, I just got Windows 7 RC1 installed. I've never used Windows 7 previously, so I was curious to see what changes were in store. I didn't have a lot of time to mess with it, as its pretty late.

My initial thoughts were:
* The UI is really really different. Internet Explorer has a weird way of grouping tabs/windows. I'm still trying to figure it out.
* Slashdot.org apparently caused IE 8 to freak out and a window came up asking me if I wanted to 'Recover' the page, or some such action.
* It looks really polished. I'm using Vista right now, and if you can imagine Vista looking a little cooler, that's what 7 looks like.
* Changing the resolution on my screen was interesting. I found it after a few seconds, but its not in the usual place. Kudos, I guess, for making it fairly easy to find... :)