Haven't messed with the depth sensor on an iPhone yet, but you could do it with Kinects and other depth cams like the Intel Realsense series.

In my experiments with those, the main drawback was ergonomics (device of varying size depending on the sensor, connected to a computer via at least one cable as you moved it around the thing you were scanning).

On a phone or other standalone/self-contained bit of hardware, I'd imagine it makes things easier.