You're talking about Vienna. I've stated that Vista is Microsoft's last 32 bit desktop OS. The trend in applications is changing, starting on server software. For example, the next version of Exchange is 64 bit only. That will eventually happen to other server software and filter down to the desktop.

>Or until MS changes Windows enough under .NET technology that it will not run on newer versions of the OS. Look for this in about 2010-2015 time frame.