As a diagnostic tool it might be interesting. Also as an amusement. For diagnosis it should be a lot like your normal situation, I think, or you might be fooled. It would be nice, for a trivial example, if the front part looked like wood, and who knows what the active mass is.
As for those who would give someone with such a stick action, if a player you don't know shows up at your pool hall and wants to bet you a few or a few thousand dollars, you may want to reconsider. While this particular version does look like a worthless gimmick as far as actual play goes, it is probably possible to build a similar thing that shoots far more accurately and repeatably than anyone here. I'll bet that Earl could beat most bar players using this cue.