With PCs as they are now, there's no base-line, no consistency in what the hardware can do. Sure, games might have minimum and recommended specs, but they're not perfect, and its often a blurry area.

What I was getting at would make it black and white. Either my Win8 PC could play Xbox 720 games, or it wouldn't. So A Win8 tablet, probably not, but a powerful Win8 gaming rig, sure.