That's a fair point, but I struggle to see how we haven't already reached that point with smartphones. Most people today already have a portable screen they can comfortably stow on-person, it feels like a hard sell to get them to ditch their TV and smartphone for a situationally useful headset. Doubly so if every participant needs a discrete headset.

While I enjoyed watching movies in VR, it's just more comfortable to lay down on the couch and watch a movie without a headset on.