It's strange because they don't want to put Oculus Rift on consoles because they are not powerful enough for it, but mobiles are not expected to be more powerful than the latest consoles for a very long time. Mobiles are not expected to match processing power with consoles until about 2014 and that is with the old generation of PS360. The new generation of consoles is not even powerful enough and imagine how long it's going to take for mobiles to catch up to that!
The main secret to John Carmack getting things to work is that he deprives his engine of some major features that require large amounts of hardware resources, and hopes nobody notices, but once people do, it totally spoils their mood. In the Doom 1 & 2 engine, it was no slopes in world-space or even in camera-space because all the world surfaces were completely horizontal or vertical and the camera could never rotate on the pitch or roll axes. In the Doom 3 engine, there were no gloss textures, so decently depicting slimy parts of models, for horror effect, were not possible. Not a good idea considering that Doom 3 was a horror game.
With Oculus Rift on mobile devices, I can pretty much guarantee you that in order to provide the amount of spatial and temporal pixel throughput sufficient to prevent nausea, they will have to lower the sophistication of the graphic engine severely to about PlayStation 2 levels. Actually this is nothing new for mobiles because many games are already down there because many people don't have the latest mobile hardware. It's the same story as with PC; game developers usually target their games to run well on the medium hardware for the time; anyone with high end hardware usually just burns that extra processing capability on higher spatial and temporal pixel throughput since that is what is easiest for the game developers.
So anyway that's the secret to why mobile devices will get Oculus Rift support whereas consoles will not despite consoles being more powerful; mobile device gamers will tolerate low sophistication graphics whereas console gamers will not. That doesn't fill me with excitement, and it shouldn't do that to you either.