Arriving at Penn Station has benefits if you're traveling for business. Hailing a ride to get to an office within 15 minutes beats the long ride to get downtown from one of the NYC airports.
That's kind of already happened. The Moynihan Train Hall just opened up recently. I checked it out recently and it's quite nice, certainly much nicer than the old Penn Station. The next time you're getting off in NYC, walk towards the back of the train you came in on and then go up to the surface, and you'll be exiting in Moynihan instead of Penn.