I doubt it, a lot of people's machines that currently run XP would not be able to run Windows 7 without upgrading the hardware. Even if they could they either don't care or think it's too complicated.
Most of the people that are left know how to pirate it anyway or have annual agreements with MS anyway so they are basically competing with that.
Most of the people that are left know how to pirate it anyway or have annual agreements with MS anyway so they are basically competing with that.