Basically, it boils down to this: QuantumFilm increases the cost of producing a sensor by some factor and it increases the efficiency of the post-filtration light detection by some factor. If cost is too high, the efficiency increase too modest compared to other technologies that are in development, or they have to trade off any other sensor metric (e.g. readout noise), the idea will get passed by like most tech innovations. Simple as that. Silicon Valley graveyards are filled with such ventures.