Smart airport moving walkway

We've all been on moving walkways at the airport. Passengers can often avoid walking as much if they just get on these large conveyor belts and stand there are they are gradually taken closer to their gate. However, the passenger's luggage is actually handled more intelligently than the passenger themselves. The luggage is given a tag, and is then routed to its final destination by computer. Why not give every passenger a card that they can swipe when they come to a moving walkway, and the walkway would automatically move that passenger to the right destination. The walkways would have to be expanded so that they went directly to every gate, and technology would have to be used that would allow the section of the walkway that the passenger is standing on to be detachable and manuverable enough to accomplish this. That way, passengers would never go to the wrong gate, and would not need to be able to read the native language of whatever country they are in.