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Conference calls. Team Meetings. Seeing your family when travelings. Playing games with kids. Lots of use cases. Live concerts. FB 3.0. Online Gaming. Virtual Amusement Parks. Doctor Visits. Online Shopping.

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These are all good examples for video-wall style high-def setups for videoconferencing. Which also has some advantages, like being socially much more acceptable in a workplace, being able to accommodate multiple players with one device, 0 putting-it on delay etc. It's less fun for such experiences as the Virtual Amusement Park, sure.

I expect to see such high-def video-wall setups achieve market penetration faster than 3D headsets. It's "worse is better" all over again.

You can't play games in VR together with a videoconferencing system.

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