Is the date you quoted just your own speculation...? I only ask because Polygon listed August. Sooner would be better though.
The 2 potential rumors I'm hearing (Ybarra and Phil have both hinted something 'as big as BC' at E3, and having to do with software magic)
are that the X1 might actually be able to stream 4k and/or the Slim might support VR. Again, just rumors. Not sure how they would pull either of these off though.
Does anyone have any idea how much more horsepower the X1 would need to run Oculus? I'm not saying it can obviously, I'm just wondering if it would need a bump, or a big upgrade.