[mschuster91]

Not exactly, there are many LED driver ICs with SPI, and you don't really need a 1000A-capable 3V bus, just 500 or so small wall-warts ;)

[forgottenpass]

Not lazy enough. Just talk Art-Net, the instruments are now Someone Else's Problem.

[mschuster91]

More lazy: attach yourself to one of these LED-based megascreens in sport stadiums. Output ordinary composite video and you're done!