Xbox needs something similar to Airplay.

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The OS X 10.8 update for Macs has given Macbook owners the ability to Airplay their notebooks onto their AppleTVs. I am jelly. I love my Xbox, and I believe it blows the AppleTV out of the water in every single way except on this aspect. I WANT THIS FEATURE. If they released this feature in Windows 8, it would be a huge time saver for me and way less expensive then buying a $150 adapter. Many people think that Windows Media Center is the equivalent, but it is not. I can not control my PC with this feature I can just view the content on my PC. It is also very slow even though my PC and Xbox are in the same room and I have a 20mb internet connection. I want the equivalent of hooking up my PC to the TV with an HDMI cable, even if it means I only get 720p. Is there any reason the Xbox could not do this over it's built in wifi? Is this a feature you guys would want for your notebooks, PC's, phones, and tablets?