Vapor Deposition can be very expensive. High heat and energy are required for even small amounts. Look at how small that sample is! Sure, light weight cells could be useful in certain applications, but that's really not the problem right now for massive installations.
It really should be. He apparently codes in a language called "OpenCV"... I've only heard of a package called that.
Anyway, it'd be good to have the source reviewed. It'd be easy to have a coding error that judges everyone as speeding.