Polychromatic acousto-optic modulation hasn't been used in laser shows for quite some time since RGB diode based laser systems came about. Granted, nothing beats a mixed gas ion laser and PCAOM for the beautiful colors you can get but these days nobody misses dragging around water hoses and sorting out 60 Amps of three phase power to run those old beasts.

Maybe? Show lasers are much more than 150mw. Lasers can be combined but I’m not sure the practicality of combining 100 chips to get 15w.