There will be six versions of Windows Vista and to help consumers Microsoft has decided to make all four consumer versions of the operating system available even after installation. This will be possible via the instant online upgrade, Windows Anytime Upgrade.
Meet Windows Anytime Upgrade. Matt reported on WAU earlier today on M-Dollar, but I wanted to bring this to the front page because I think the news is bigger than it looks at first glance. The approach is simple: Microsoft is going to pack all four operating systems versions into a single disc package. Once installed, a quick trip to the Control Panel is all you'll need to upgrade from Home Basic all the way to Ultimate, should your heart desire. That, and a credit card.
The puzzle pieces needed to make this happen are actually rather simple to put together. All four versions of the OS are based off of the same core OS, with the Ultimate edition sporting all features. As such, putting all four versions on a single disc is no great feat.