Edit – The leaker has come out & openly acknowledged of the leaks as being unreal and just concepts. The moto as being cited by leaker is that he wanted actual info on WP8.1 to leak out and below things would have acted as trigger for that which though did not happen in reality.
I know this is coming fast & could equally be unreal but here you go. Below is a representation of the revamped games hub in Windows Phone 8.1 and it comes from the same leaker.
Improved UI and SmartGlass Integration (by the way the spelling in the screenshot .. Oops)