Hey man they were experimenting with VR before Oculus. They had an early prototype that they released a trailer showing the the set up with the PS MOVE Game Datura. So stop it, ok.
It's like you didn't read the post you just quoted and this is not meant as a personal attack, because maybe you are doing it unintentionally. Let me try to explain again:
Sony could have been experimenting with VR in the 50's beating Sutherland to the development of an HMD and this wouldn't change that Sony is bandwagoning to the VR trend in this round. Why? Because of commitment plain and simple.
While Sony is a company very innovation driven, their videogame branch is more reactionary than proactive and that has worked fantastically for them, so there's nothing wrong with that. Interestingly, this is all very similar to past events involving Sony and MS. Various examples:
The inclusion of motion sensors in the DS3 was a reactionary Move to the Wii Remote without much of a clear goal going forward.
The move was yet another reaction to the Wii Remote after the Wii was a record breaking success. Do you guys remember at that time that Sony began spreading videos with Dr. Marx and he's experiments? Yes, Sony did have a product and various experiments with motion gaming but that didn't meant they had the commitment to that type of interface until they saw that trend and adapted to it.
MS did something similar. When they were fetching for a motion solution, they first demostrated a wand type of device with motion input, one of their internal experiments. Yet again, that doesn't meant they weren't following a trend.
It is quite curious that they have been experimenting all this years (and this stated with zero sarcasm from my part as the fact has been proven) yet they will arraving later than Occulus and without a more robust answer to Oculus touch. Also there isn't a very VR driven killer app unveiled from their part, which is strange considering the years of experimentation. Most 1st party VR software seems to be typical gaming stuff retrofited to VR.
The company that did present something forward thinking is Valve. We can all agree with that i think.
i would close by saying that this round seems like a triumph for consumer level VR but a hollow victory for creativity. Basically, the tech companies i've seen that wanted to do a VR headset have done a pretty competent job, this is mostly due to the components been mature enough. Even StarBreeze pulled of some very decent HMD and demo.