There was an optical disc manufacturer near my hometown, it got converted to a city building (think the police took it over). These manufacturing facilities are pretty inexpensive to ramp up, and in terms of logistic cost, might be a ripe opportunity to come back into this market. I know optical seems like it is dying what with Sony & LG leaving Blu-ray, but just like the vinyl resurrection, and with the "You Own Nothing" of digital distribution, I fully expect a resurgence to physical media. Maybe I am the minority but I am picking up UHD disk and blu-rays and eschewing streaming both for the lack of ownership and the inherent quality discrepancy. Limited digital access is not ownership.
In terms of the gaming market, look at
Limited Run Games, their whole business model is around physical media, I think the digital hold out addressable market increases despite the trend to streaming.