Theyre going to start doing this with balls and strikes in Major League baseball within the next few years. The umpires behind the plate will have an ear piece that tells them the call. Already being tested in minor leagues. They’ll still be there to call pitches that bounce and after the hit plays, but the computer is taking over. Its a boring slow ass sport anyway though and you cant slow down a snail that much
Soccer on the other hand needs to keep the pace. There are no timeouts, and stopping play left and right messes with any game momentum too much. Id agree with everyone on limited use. 1 per team, and maybe a guy in a booth who can over-rule blatant misses by the ref