I've had this kind of conversation dozens of times. There's people out there who actually believe 4k DCI compliance will make people go back to the cinema theaters but the truth is the vast majority doesn't give a crap. Same goes for blue-ray.
The ONLY thing that'll make sales go up and consumers caring about image quality again will be shutting off the p2p networks. Free has a lot of value and as long as blue ray or 3d movies or 4k DCI cost money versus 0$ for a torrented movie things won't go up again. Once that backdoor is shutdown and people at large is paying for content again, they'll care to get the best quality for their money.
France will be an interesting case study. If all goes well the three strike law should pass soon and become effective first January.