Man, I love John Carmack. And I love virtual reality. But I don't know if I have two hours to watch John Carmack talk about virtual reality. Your mileage may vary.
I stumbled across this on NeoGAF. It's a two hour talk Carmack did at UT Dallas. Just in case you weren't aware -- John Carmack has been working at Oculus for quite some time now and, as you might expect, is a big proponent of VR.
Also: John Carmack is such a great speaker and VR is a fascinating topic. Maybe this is worth listening to after all.
Here's what I suggest, and this is what I'm probably going to do: keep this running in a tab and listen to it like a podcast. Drift in when it gets interesting, drift out when it gets a little too tech heavy for my tastes.
Either way, this is sure to be an interesting watch/listen.