Probably in the same way that VR does...it comes in waves. 3D has been around for a while, and every now and then it resurges. It has more to do with marketing

Probably in the same way that VR does...it comes in waves. 3D has been around for a while, and every now and then it resurges. It has more to do with marketing forces to excite people about going to the theater than anything. And yes, I suspect theaters will still be a thing unless teenagers find a new excuse to be unsupervised in the dark for a few hours.