Vista is epic fail, I'm sorry. I've used it enough to ensure I never touch it, ever.
Why do you think Microsoft is rushing forward with Windows 7 eh? Why do you think Windows XP support has been extended? Why do you think hardware manufacturers are offering XP preinstalled again after discontinuing it to support Vista? I wonder...
Vista has become the biggest joke in Microsoft's operating system history. Market adoption has been low, particularly in the business sector. The high system requirements are bollocks and the entire interface is far too 'hardcore' for the average user. Stuff has been blatantly ripped from OS X, and it hasn't been done well at all.
The thing that gets me is that the minimum system requirements for a lot of games actually goes up if you're using Vista. Wat?
Btw, Safari is a terrible browser. So is IE: all versions of it, in fact. The IE dev team have openly said that conforming to all W3C standards is not a priority, so I have to wonder what the hell they're doing with their time. The rendering engine blows in comparison to FF3 and Opera 9.2 and above: this is in terms of how well it renders the page, as well as how fast it renders it (which is not tied to connection speed).