Vista…
Yeah, the Windows Vista was release and I don’t want it for now…only because my PC sucks – 2.5GHz/1GB of RAM[I know...].
Microsoft made a big investment in this new OS. It has some great, and awesome features, like the 3D flip – remember the Alt+TAB? Well, instead of some crappy icons we have the “real” windows, see below.

For security they have added a lot new features. I’m not talking about anti spyware/ad-aware – included in this version – but I am talking about programs run and execution. You will be asked, like linux, to insert your administrator password every time you need to mess up with the system.
And even more: they were smart enough to keep unstable “things” away from system kernel, like the device drivers – they said that the majority crashes could be from those little things. They added a few more things to easy your online life, and others for you work, many of them could be better, but just trying I can say more about that.
To conclude: see it for your self, spend some money and hope for some free blue screens.