In a commercial laser display the laser beams are moved by galvos, these are super fast direct drive actuators that can position accurately an quickly. I haven’t got a set of galvos but I do have some servos. I’m going to try out the servos for a laser based project I’m working on. They’ll be slow – but that won’t be a problem in this project. Also, they have the advantage that I can drive them using an Arduino.