I'm pretty excited about the future of VCSEL technology. Not only is it profoundly useful for lidar and stuff, dense arrays of lasers could also be used for all

I'm pretty excited about the future of VCSEL technology. Not only is it profoundly useful for lidar and stuff, dense arrays of lasers could also be used for all kinds of display technology. If we can somehow make cheap VCSELs that emit blue or green light, red, green, and blue VCSELs could even take over general purpose lighting. One imagines a TV where each subpixel is a VCSEL. It would potentially be better even than microLED displays. The spectral purity would give really amazing colors.