Fair point if you're talking about buying the O/S separately. However I bet a lot, if not most computers, will sell with Windows 7 pre-loaded for a few years at

Fair point if you're talking about buying the O/S separately. However I bet a lot, if not most computers, will sell with Windows 7 pre-loaded for a few years at least. Looking beyond that, I'm not sure what the growth predictions are exactly, but I suspect the chances of the average consumer buying a tablet will be greater than them buying a desktop/laptop. At which point you'll want an interface which is usable with a tablet.