How do these games benefit from including a tablet? From what I can learn from the video the tablet assists you with counting points and lets you know when you'

How do these games benefit from including a tablet? From what I can learn from the video the tablet assists you with counting points and lets you know when you've arrived at the right answer. Sure, it makes things more convenient. But what is wrong (from an educational point of view) with letting children add their points/checking their solutions themselves?