Eh, VR has been around for quite awhile and has always been pretty poorly implemented. MS and Sony wouldn't risk buying into a fringe technology that has no real model behind it. Even for their motion stuff, it wasn't until the Wii and Nintendo proved it could sell did they even start putting any real investment into it. It paid for greatly for MS (the Kinect sold 24 million units, which is unheard of for a console peripheral).
If Oculus gets the software support and isn't clunky, Virtual Boy garbage that burns your retinas, we might see console versions / integration.
Motion was a flop for Sony and Microsoft is basically betting the farm on stuff that they know isn't even popular.
Have you read, well basically anything about this? It wows literally everyone that uses it. The software isn't an issue, at least the word is the API is actually good and robust, but they need games to properly use it. Its easy to get it working with games but needs developers to polish it to work out stuff like UI issues.
Sony has actually said they have Oculus units that they've been playing with. Considering all the other half-cocked stuff they've tried I don't see why they'd balk at this. Buying Oculus early would be cheap and they could lock down it to their system which would be huge. They wouldn't even have to have it launch with their system, and Sony could have leveraged it in other ways (they have an expensive 3D head display that isn't all that great).
Plus Microsoft or Sony would be able to get a company to develop or tweak a display if necessary, which means they wouldn't have had to dink around with the 720p panel they've been using (they also had problems sourcing panels, which the clout of a large company would have likely taken care of). Plus with 1080p 5" OLED displays, I'd think that would be a great fit for it.
I'm actually glad they haven't as I'd be much happier about it being open and being able to use it on PC. Really that's the only reason I can think is that Oculus refused to be bought out.