Even if you're not in the market for a Surface or a Zune, it might be worth stopping by the newly opened first Microsoft Store in Scottsdale, Arizona. That's where you'll be able to play in the gaming section, which sports a ocular-orb-overloading 93-inch screen. Which is pretty good. If you like big screens.
If you look really hard, we'll bet you might even find a copy or two of Windows 7. Maybe.