Know what's even more practical?
A flat pixel-based display that can be printed in basically any size and resolution, draws extremely little power, operates a low voltages and is compact and light enough to be incorporated into low-cost handheld or portable devices. And also isn't a high vacuum tube filled with death.
A flat pixel-based display that can be printed in basically any size and resolution, draws extremely little power, operates a low voltages and is compact and light enough to be incorporated into low-cost handheld or portable devices. And also isn't a high vacuum tube filled with death.