ActiveWin already has screenshots up of the new build 5270 of Windows Vista. This build is the December CTP which is very close to feature complete. It includes features such as Windows Defender (which was known as Windows AntiSpyware), a slightly redesigned interface, better firewall and security, Windows Media Player 11, and Internet Explorer 7. If you are interested in more details head on over to check out some of the screenshots and features.
News Source: ActiveWin