For those of you who want another point of comparison for how powerful this laser is, advanced LIGO detected gravitational waves for the first time in 2015 with an average laser power of only 23W (though we use a lot of tricks to boost the power of the beam, like Fabry-Perot cavities in the detector arms).
(From "The Secret Life of XY Monitors": http://www.jmargolin.com/xy/xymon.htm)
(4 WATTS of laser power? He's going to burn through his screen if the beam stops moving.)
As far as flicker and point rate is concerned, it's possible to divide rendering work between projectors.
A few seconds from 1:42 catches the work: https://www.youtube.com/watch?v=uUEPSuQ6PMs
A lot of us work on open source bindings. (Much of my laser code is in Python and Rust and is available on Github, linked in my profile.)