I will avoid Vista like the plague. Everything works okay without it, so why would I want to change anything?
Because it won't stay that way? Don't get me wrong. I want nothing to do with Vista, but eventually for one reason or another (work, most likely), I'll have to use it. If you are fortunate to be in a position to go all Mac, all Solaris, all BSD, or all Linux, good for you. Most people, whether ordinary joes or IT guys, aren't in that position.
You wouldn't be changing much if you did upgrade to Vista. Aside from the horror described in the article, the only obvious difference is it's allot prettier and has a few under the hood security enhancements that will doubtlessly be cracked over time. It also loves to ask you questions. The only things I found myself really liking about it are the sidebar/gadgets, the new navigation with the address bar, and the Aero(spelling)theme.