And then there would be the annoyed guests waiting in lines while some clueless guests - especially those with few or no computer skills - spent forever trying to deal with these systems. This would lead to congestion.
And then what about machine or system failures under heavy loads. How annoyed would people be who has stood there waiting to use it.
And the number of CM's necessary to deal with all this ? Oh well, I guess they could be more Guest Control fodder later when the machines usage declined.
The current machines are simple and the system less than perfect. But at least it doesn't have the potential for creating as many problems and issues as it is supposed to solve.