Hello, I would just like to add, that the biggest reason for keeping 32Bit at this very moment is likely the netbook market. Win7 is actually targeted to work on Netbooks so that they can finally phase out XP (which is a big win as there is alot more security issues with it to maintain). There will also likely (it is announced at least) be incarnations of the Win7 chopped down kernel in an embedded environment (Like XP Embedded before that) http://www.microsoft.com/windowsembedded/e...ec-release.mspx This is all good, because it forces Microsoft to focus on the foot print of the OS. This is likely something they don't mind either, because they got all the nedded security foundations into Vista, so now they have time again to focus on the essentials.