If we had the ability to "queue" up moves it would increase the pace at which correspondence chess is played, to a certain degree of chess playing skill. For example if you see forced mate, you could put in that if your opponent plays a certain move it will immediately make the move you assigned it to, as long as your opponent was to play that move. And as long as players get creative, its usefullness doesn't stop at mating nets.
If this has been allready suggested i apologise. If not, any questions/comments?