Steam VR has a player that can use your PC to stream stuff, including even controlling your PC desktop. I don't think it's comfortable to have a screen right in your face with a heavy thing on your head, it's easier to watch something in a relaxed posture, moving your neck how you see fit.

I think it will take off when the gear becomes slim and light - like a much newer generation of glasses. Something that as far as I know is still in the realm of sci-fi - but not far.