Now, I'm completely removing my bias as a programmer to say this, but it looks like windows finally came up with a beautiful design for their OS. After seeing Aero, I have a hard time looking at XP, which looks better than 98/2000 and doesn't use excessive graphics card effects, but I'd still trade a little bit of the processing and RAM for a few feng shui benifits of vista. For someone that looks at a high definition moniter 9 hours a day at work and then comes home and gets on the computer, it is really nice.
Although, if you actually play around with it, you'll notice that Aero isn't even the thing taking up the whopping resources in vista, though I bet it does detract from your graphics card, which is harder to find the processing diagnostics for.
I still have a few complaints with vista's UI, though. I can't figure out how to turn off the damn "allow or deny" messages even though I'm an administrator and should be able to edit important configurations freely, for one thing.
Wow, it's amazing how well i can type now while I'm plastered.