This video illustrates that the answer to OP’s question is: because in almost all cases it’s probably cheaper and more flexible to do it in CGI. The only time projector mapping would be useful would be on live performances.
Which would be cool, but probably too subtle or constrained for the audience to appreciate? Like, how far can the projectors be, and how bright to overcome stage lighting? How much can the actors move? In the Pond ad, the model moves, but very subtly. I noticed it most when she makes a slight shaking movement to coincide with the makeup “falling off.” There are no sharp movements.
This video illustrates that the answer to OP’s question is: because in almost all cases it’s probably cheaper and more flexible to do it in CGI. The only time projector mapping would be useful would be on live performances.
Which would be cool, but probably too subtle or constrained for the audience to appreciate? Like, how far can the projectors be, and how bright to overcome stage lighting? How much can the actors move? In the Pond ad, the model moves, but very subtly. I noticed it most when she makes a slight shaking movement to coincide with the makeup “falling off.” There are no sharp movements.