Interesting, but maybe not all that useful. The purpose of a major is to give others an implicit idea of what you studied. If I say I have a major in Robotics, then everyone can infer what that consisted of, even if it varies across universities (in which case that knowledge usually disseminates). What happens when I say I majored in robotics, but I failed to actually include anything on the hardware side of it and only really studied AI and control algorithms?