This is not a new subject. We know that GPS has made big time inroads into current navigation. However some airlines are experimenting with what I will call "Hands On Ground Control". Apparently with some early tests by Delta, Alaska, and UPS there can be a significant time savings with this onboard feature.
"It is a revolution in technology, but also in politics. Previously, the F.A.A. usually bought new systems on the ground and told airlines to equip themselves to use them; now the airlines are taking the initiative to outfit their planes, with safety regulation from the F.A.A."
"Airlines are even developing their own approach patterns for airports, which has almost always been a government job."
"Using new technology, planes take off following a narrow route, so that that jets right behind them taking different routes do not have to wait as long. That makes the system move a bit faster."
Here is the writeup on this whole matter:
Courtesy: The New York Times