> I've been using Windows since 3.1 and I honestly don't ever remember a situation where a CPU wouldn't run a recent version of Windows.
I think the situation being discussed here is the other way round: that brand new, yet-to-be-released hardware potentially won't properly run an *old* version of Windows (i.e. Windows 7)
But it's a bit of a non-issue. Sure, Microsoft may not support Windows 7 running on new hardware which didn't exist at the time Windows 7 was released. But if there is a market demand for it, the hardware vendors will provide their own Windows 7 drivers.