Ok.. I'm not gonna give in on my answer, but I see the way it could potentially work now.. Still kind of mind boggling.
So.. this leads to the real world applications and possibilities:
Why not build this huge conveyer belt system as an alternative to making short runways on a mountain where real estate is a prime commodity???
Think of the potential a system like that could have if it worked.
This way larger planes could take off in a small space, and cargo can be brought in by air to these reletively remote places.
Uh oh though.. will this same problem work in reverse, yet be to my thought advantage this time, and make the plane land and stay still so as not to leave the area of the huge conveyer belt and still use that same small real estate???
Or will the speeds (plane and treadmill type device) have to be non equal and perfectly harmonized for this to work, and this is just a pipe dream???
Yeah..

-------> ( Me - "Outside of box")
BOX