I dunno. I think it's part of the experience, like going to a concert or theatre or football game where you'd get a much better, clearer view of the action/event if you watched it at home. There's likely a big social factor to be able to talk with mates about it too.
They only need to tell people to watch this full 4K Video at the same time. No need to be stupid and suffer the limits of 720p to 1080p 5MBps video.