Vista may be the cat's meow, but I'm not going to spring $200 for an OS, and then drop another $300-$500 on a DX10 capable GFX card just to run the few games that are DX10 so far. I had planned on going Vista, but by the time M$ finished butchering it from what was originally purposed and I saw that it was released only half-baked, i decided to stay put.
I can wait for the next big thing, or the one after that.