A tug that does the push and then tows out to a suitable holding point is only a matter of time. The problem is trying to make it unmanned - they will want to save the manpower. Since this process could be initiated now, I wonder what is holding the airports back.
Oh, silly me. The airports say that the carriers benefit more than they do, so they should take all the costs. The carriers say that the airports will be able to meet their noise regulations more easily and so
they should pay more ...
If there WERE tug assist to the hold, it would certainly fix the problem, recently discussed, of not having anough tugs to go around to carry out all the pushes on time.
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"I tell you, we are here on Earth to fart around, and don't let anybody tell you any different." Kurt Vonnegut, Jr.