Rami Tamimi has several videos where he uses an iPhone's LiDAR to build 3D models and compares the results to data collected with more conventional methods. youtu.be/GObsBqEwq6U?...

I would say anything related to projections. People get lat long but the move from the 3d world to 2d isn't intuitive and non-GISers think we are making things more complicated than they need to be.