Airlines should rent these, already set up for movies or whatever. I'd pay to give it a try. I wouldn't want these taking up my carry on space going to and from the airport or to deal with security, so that's another advantage.
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There are already tons of places you can go and rent time with VR. Or even just 3D movies and experiences where you need special glasses.
Airlines already have reusable noise cancelling headphones and drink glasses in first class.