Well what if MS tries pushing Games for Windows again?
EDIT: Ah it was mentioned, anyway, this could be their attempt to bring back the concept and create an Xbox Live service based PC regulation environment.
Since Miracast is a feature of Windows blue, there is a chance that MS might allow any service to stream games from the PC or supporting mobile device to the X1. Depending on the minds working at MS, it probably would be better to expand the uptake of Windows blue and X1 by opening up the technology for any service to use then just their own. By opening it up to everyone, it would increase the chance that other services like GOG, Steam, Origin and other players to make their games stream this way. It would increase interest for people to get Windows Blue and X1 just for this ability. Next thing you know, if the service opens up for Emulation then MS would have a killer app.
People who believe MS woudl not allow this have to remember that MS is looking to expand their products. Sometimes it make sense to keep things only on your service but then there are times when you need to be as open as possible to make your 2 prime products separate themselves from the competition. Windows 8 needs more consumer traction and X1 needs something to separate it from the PS4.
Yes that would be awesome, but looking at Windows 8 it seems to be a big attempt to control content and isolate software to their platforms. MS has been doing this for a while now.
Actually the only thing that MS has done that goes down this line is the Windows Store. In some respect, its interesting that MS is getting so much crap for the Windows store when Apple has the same thing on their system and people think its great. Its not like there are not other services or stores people can use so you cannot really fault MS for having their own. I only see the store as a means to make it easier for people to get what they want digitally and for MS to stay competitive with Apple.
Also another plus I see is that you will actually only have to purchase one app if MS made this possible. If you bought a game for your PC, you could Miracast it to your phone, tablet or X1. Using MS cloud services, you might even be able to stream that game when you are on the move but I have to admit thats probably would not be free.