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Has anyone tried using 2 apple tvs in the same house? Can it work? I have a 2nd gen Apple TV I want to move to my bedroom tv and buy a 3rd gen Apple TV with HD for my living room. Can I have both in the same house and use from the same computer? Will you be able to select which apple tv you want to air stream to?

We have three. If you have the Internet/network bandwidth go for it.
 
Ditto to what everyone else said. I've got a piece of crap PC (w/ an Atom processor) running iTunes for Home Sharing, and I've had two ATV's going at the same time. Make sure you've got a decent router, but beyond that, you should be fine if you got the bandwidth to handle it.
 
I have three AppleTV 3's. Two are wired via Ethernet, one is on WiFi. No problems with each streaming a separate 1080p movie at the same time.
 
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