Aside from perhaps Rez Infinite, VR doesn't really have a killer app yet. Almost no other title can deliver a compelling experience without risking motion sickness and eyehurt, and Rez Infinite just isn't enough for J. Random Gamer.
As for games... locomotion constraints really do a number on what works in practice. Carmack's inside-out tracking seems to be coming along well, but then the problem shifts to securing a large enough play area.
I'd buy and use this setup if it had the resolution for a lot of money and take it to work (noisy office, literally no reason for me to see around me, open offices have a lot to answer for).
Once that's passed, E:D also features a lot of small text. Also, the default behavior of the cockpit control panels in VR - appear when you look at them, disappear when you're not looking exactly at them - encourages some head movements that will give you neck pains really quick.
All that said, there's something really compelling about feeling the tight cockpit of a Sidewinder, being able to stand up and walk around the cockpit of an AspX, or looking through the glass floor to line up a landing in an AspX.
+1 to SuperHot & Virtual Rickality, too.
Nobody wants to be the one to tell their buddy "hey check out this porn on my VR headset" so it's not growing as fast as it could via word of mouth. But it's a very very big step up in terms of UX.
Would someone pay $300-400 for a better porn experience? Probably not.
But if we're talking about "of the people who already own a VR HMD and still use it often rather than letting it collect dust, what do they actually use it for?"
The answer is porn.
But, you do have a point. However, it's going to be a long time until the VR technology catches up, there's no great social experience (as far as I know) that isn't sitting at the bottom of the Uncanny Valley.