They do it now.

There is a airline that is testing/using a system where the pilot taxis
out onto the runway at SFO — pushes a button — and next time he touches
anything is on the runway in Japan… and then it is just to break and taxi in.

–
Marshal H. Perlman                                Telephone: (407) 952-0547
Information Technology Director                         Fax: (407) 728-8464
American Motor Works Company                     Voice Mail: (407) 455-4809
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