I haven't tried oculus myself but I think there is some need for caution here. Virtual headsets still do have some problems that are very hard to solve even with truck loads of money. And when it comes to virtual reality headsets and systems there are alternative ways to do it. I'm not sure if oculus is the best solution. To me it seems oculus is the kind of solution that is for certain group of enthusiasts.
So what are the alternatives? Well there is the wearable tech approach like google glasses. That is going to be the mainstream approach in some form. That is probably closer to facebook's current ecosystem than oculus which atm. has absolutely 0 usability for any social based software. By usability I mean anything you can do with facebook and oculus now.
Then there is the middle ground between oculus and google glasses. CastAR. Something that takes what is around you and then adds the virtual reality to it. Instead of putting a tv right in front of your face and hiding everything else it puts you into the middle of it. Best of both worlds.
CastAR is by far the most interesting of these techs for me because it is essentially the holodeck tech from startrek. Oculus is just tv attached to your face and google glasses is a small tv.
As far as oculus goes I would be surprised if they would only come out with single product in the end. They have to cater for gamers because without gamer specific product they will instantly kill oculus. Current facebook users imho aren't early adopters and any virtual reality based systems still need to be downloaded to your computer. In other words oculus needs a fast graphics card and that will limits is usefulness. Other option is to watch videos in oculus and what's the point in that?
But even if oculus seems to me like a niche product in the end what do I know. People buy tons of tablets. I would have never guessed that becomes popular. I always thought tablets is a stupid gimmick product. A bad notebook. But there are are almost as many tablets sold as notebooks. How the hell did that happen?
Anyways one of the biggest roadblocks for any virtual reality product is money and pr. Facebook can spend as much as it wants. Even when you put the 2 billion dollar number into perspective the valve's (valve=steam) total worth for example is somewhere between 2 and 3 billion. Valve could never compete with facebook when it comes to throwing money at you. When we are talking this huge numbers there are only handful of businesses that could buy oculus. Maybe facebook was the only one that was interested? What did they get for that 2 billion? Not a whole lot imho. Mostly what facebook got was the name and brand of oculus. And couple of years of development and testing. The tech itself is old. VR headsets is not a new thing.