It looks like Microsoft is already developing their new OS, Windows 8. Windows 7 is not yet officially released and I already found something which could indicate that Microsoft is sharing information on Windows 8 with some companies.
I could be wrong but take a look at the screenshot that I took yesterday (19/10/2009):
Does VMWare know more about Windows 8?
Oh before I forget: Get yourself Windows 7, it’s so smooth!