Thurrott.com(Specially Brad Sams) have a live-stream up that is going to cover some information relating to "Xbox 1, Xbox 2, Xbox E3". Currently just going over the Windows phone news but should be getting to the relevant Xbox information soon. Figured that due to the source (he called the Xbox Elite controller) it warranted a thread - could still turn out to be nothing though so keep that in mind.
2 smaller devices - one smaller streaming only device (ala Chromecast) the other more like the Apple TV.
Xbox Interface coming to PC. Xbox transitioning into a platform.
More powerful Xbox One coming next Spring (new architecture).
Controller getting minor changes.
Tom Warren:
Originally Posted by creamhackered
All I can say is that there will be Xbox hardware that's 40% smaller than the current one.
"Xbox Nano - will be a streaming device similar to Chromecast and Amazon's Fire TV. Pricing point may be around $100.
Xbox Slim - Slightly bigger. He does not use the name slim, but from what it sounds like that would be the case
Xbox 10 TFlop - looks to be in the works, but doubtful to be announced at E3. Instead he is hearing Spring 2017 as a release date. Virtual Reality and 4K Video playback will be a thing. He says this leak comes outside of Microsoft so its no guarantee.
Xbox Interface coming to PC, and Xbox + PC will be a big theme at E3 as more stuff is coming to PC."