It was Major Nelson that said we're in for a big announcement on the 15th. Everybody hoped it was OG Xbox BC, but Phil shot that down in a tweet by saying he doesn't want people to get overhyped and that it isn't OG Xbox BC. I'm hoping for the emulator to make its way to Windows 10. I think that would be the best move Microsoft could make right now to speed up adoption of the Windows 10 store.
You can't just bring anyone's Xbox 360 3rd party games to the PC via an emulator. Pretty sure publishers and devs wouldn't like that, as they mostly already have PC versions for that purpose.
Completely different story if publishers give the okay, but I'm not seeing it. Same as "Play Anywhere".
Oooh. Source? (Just interested.)
That source was kinda debunked.