Not likely... Most all of Microsoft's huge corporate clients are committed to moving to Vista. Microsoft knows that once they have it at work and are forced to use it every day, the average consumer will get used to it, stop their bitching, and buy a new PC with Vista for home. Microsoft may very well release a second release of Vista, but there is no way they would risk pissing off corporate America by shortening the lifespan of the platform to push out Win7. With corporations like mine in the middle of projects with budgets bigger than you would believe to convert 200k employees and 100s of custom apps to Vista, Vista is here for it's planned lifespan.