Indeed, but the mount the projector and receiver on must be constantly calibrating movements and adjusting smoothly. In achievement terms this is almost all so

Indeed, but the mount the projector and receiver on must be constantly calibrating movements and adjusting smoothly. In achievement terms this is almost all software (once you take putting stuff in space for granted). Think of proving it to work in theory, ground based prototypes etc. Error detection is also interesting (though mostly solved but with many options available). High bandwidth laser comms have been around for a while. Originally developed for the financial industry for intra city comms.