Just sitting here at this forum, only 1% of my CPU is being used, with Vista Home Premium, and all 'special effects' on. 22% physical memory, but that's because I have an antivirus program always running, and those ate RAM even on my XP computer.
I know Vista is slower than XP, but this is a brand-new computer, and is way faster than my old laptop, so the difference is compensated by my comp's age.
The security features don't bother me. I like having to think a little before I click the "Continue" button, because I download a lot of things, and who knows if there is spyware or viruses lurking within? Besides that, I've gotten used to it. Let's face it, I have a lot of time on my hands. Too much, in fact. XD
Don't bash me because I love Vista: everyone's computer experiences are different. Some people will have truckloads of problems, others won't. I just got lucky with my HP computer.
Edit: According to Wikipedia, Vienna will be released in 2010. If that's true, I don't have anything to worry about. Usually Wikipedia refers to rumors if they're out there, but I don't see anything regarding Windows dumping Vista.