I just finished installing Windows Vista Ultimate RTM on my Dell Inspiron 9400 dev laptop. I used to run Windows XP and Windows 2003 on this machine.
I was impressed by the fact that Windows recognized ALL my hardware, including the onboard WIFI and bluetooth radio's. This was not the case when I installed XP on this laptop.
I think it's going to take a while until I'm used to all the new icons though.
After I've installed Visual FoxPro and VS2005, I'm going to create an Acronis image of my drive and then I think I'm going to relax for a while and take off with my Cessna 172. Yes, the other day I received a copy of the Flight Simulator X and this looks like a really cool sim.