I just installed Ubuntu 7.04 on my desktop
My PC will not handle Vista, I tried. It takes minutes to get "my documents" to open.
It simply rocks!
My PC is lighter and faster (boot up, opening files, starting programs). It even performs better than XP which I was using!
The new desktop effects are amazing, think vista's aero style. Just look at this:
Open office is lighter than MS office, produces smaller files than the latter and can read / write ms office files.
Installing programs is easier now. You have synoptic which is like add / remove programmes. Tick on the ones you want and it will install (a list of all Linux programmes are downloadable and refreshed every time)
Wine will enable you to run win exe's (including games)
you will mostly need no drivers as Ubuntu will take care of it, in the off chance, use ndiswrapper to use the windows driver.
It even migrated my windows account (I have a dual boot) and I don't feel like I'm missing anything at all!
I am really impressed with this release. I strongly suggest that you download the cd, it has a live cd session, just boot from cd and you have a full working Ubuntu (great as a rescue CD BTW) and if you like it you can click the (install) button.
Seriously, try it out and tell me what you think.