While it’s not our main communications method, infrared communication is a thing, and it’s a lot closer to visible than radio.
Also, Elon Musk claims that SpaceX is going to enable laser links for inter-satellite communications between Starlink satellites soon (admittedly, not within the 2020 target year, but this is still pretty close!)
As for 3D TV, if I expand the context you see it’s an explicit replacement for screens
My reading of the context is that screens are supposed to be the predominant form, and cube 3d is a prototype. This seems to be a correct prediction: see “crystal cube” here.
While it’s not our main communications method, infrared communication is a thing, and it’s a lot closer to visible than radio.
Also, Elon Musk claims that SpaceX is going to enable laser links for inter-satellite communications between Starlink satellites soon (admittedly, not within the 2020 target year, but this is still pretty close!)
My reading of the context is that screens are supposed to be the predominant form, and cube 3d is a prototype. This seems to be a correct prediction: see “crystal cube” here.