What does this have to do with anything? If someone were to switch cellphone plans they could use that money for literally any brand. Apple/Samsung own 68% of the cell phone market. Both of those companies can put a projector in a phone at anytime. They haven't because I'm sure research has shown that people don't want that gimmick. They put them in video cameras for awhile until they learned nobody wanted the feature. What's hot now is VR.
If someone is wanting to watch 4K they aren't going to watch it on a low grade projector phone. That would defeat the entire purpose.