3D displays are too much effort for casual use and current 3D content isn't impressive enough for people to go to much effort to get it, hence no more 3D TVs.
AR has definite potential, and I don't know enough about the details of AR with stereoscopic cameras to say why it hasn't been pursued instead of the approaches Project Tango/Hololens are taking. But it still hasn't reached a place where the extra effort would actually be worthwhile for most people.
3D displays are too much effort for casual use and current 3D content isn't impressive enough for people to go to much effort to get it, hence no more 3D TVs.
AR has definite potential, and I don't know enough about the details of AR with stereoscopic cameras to say why it hasn't been pursued instead of the approaches Project Tango/Hololens are taking. But it still hasn't reached a place where the extra effort would actually be worthwhile for most people.