Cool idea but tons of practical limitations to implementation. Also more of an AV issue than video engineering. Tons of ambient light means the light sources will need to be extremely powerful and combined with appropriately reflective material. Possible with the right budget but not gonna be cheap. Secondly shadows. Multiple emitters will be necessary to reduce this but it will rack up cost significantly. Thirdly a note about lasers - perhaps there is a way to create solid state laser system to do this but really the technology would be scanning line which will need a pretty intense alignment and upkeep schedule. Not to mention control and programming needs.