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That might be unfair. OR was a public campaign because it was publicly funded. Companies like Sony can't go waving their R&D in public in case of giving away ideas to the competition. Reportedly they've been working on this for 3 years, and I'm sure they've dabbled with the idea before. They may have got some ideas from OR, but that's the problem with revealing your unfinished ideas - you leave yourself wide open to copycat products, unless you have a watertight patent situation. Which is why Sony et al don't say what they're working on until they're ready to as based on their evaluation of the competition.
There's the possibility that even without OR, Sony would be releasing this VR project. They had the HMZ, they probably tried VR on PS3, found the experience compelling but felt the technical limits (PS3 hardware, headset cost) meant a product would have to wait, and carried on with prototyping until they found something that was viable.
There is of course the possibility that Sony had no ideas, saw OR, and copied it using their established R&D talent and financial power to rush through a clone, but that strikes me as far less probable. I'm reminded of Move and claims Sony copied Wii, whereupon old R&D videos of glowing ball tracking on PS2 disproved these. Sony didn't release Move until they were ready (quite possibly prompted by Wii's success), but they had it waiting in the wings. Perhaps they've had a VR prototype in the works for a while, and it took OR's public success to motivate management to actually release it - something that we've heard Sony can be reluctant to do with it's R&D creations.