We already don't need a crude process like you describe for lighting applications: look up "chip on board" LEDs, or COBs. The brightest single element LED light

We already don't need a crude process like you describe for lighting applications: look up "chip on board" LEDs, or COBs. The brightest single element LED lights you can buy today are all COBs. What we need is finer COBs that are monitor sized, and wired like a monitor.