Wouldn't know, I've always had Vista on my power-rig and about 1 yr ago upgraded to Vista Ult x64 and have yet to run into any serious problems. I don't even get the "driver error" everyone seems to get with the Vista + nVidia mixture (used to, but fixed it).
Keep in mind Win7 is Vista... just with a "from the ground-up" kernel (brain code that runs it) and a complete overhaul to the systems usage, and by all rights a brand new OS... but still.. it's just a lighter version of Vista... so SHH. lmao.
(Real Answer: No, not everything is better than Vista, but Win7 has got it beat to the 100th degree)