I am not sure what the best approach would be for this... It would definetly slow down the game as players would want to see points a lot...
It could just be used by the chair ump to verify calls"? It might be neat if the chair ump had a small screen on their chair that showed where the ball really landed according to "Shot Spot" and they could overrule that way and the players wouldn't have to be involved.
Either way, I would like to see it in the ame of tennis somehow...