PC World: "Microsoft for some time has been wanting to kill off XP --- and when Windows 7 hits, the company will finally be able to do it. Here's why Windows 7 will let Microsoft pull the plug.
First off, it's no secret that Vista hasn't been embraced by enterprises, many of whom have treated it like the plague. That's unlikely to be the case with Windows 7. One reason: Vista wouldn't run properly on a fair number of PCs in enterprises when it was initially launched because the hardware wasn't high-powered enough."