Just to clarify, since I'm not a STH but am considering doing so for next year ...
I've never had an "official" printed ticket in my NATS life.
I order online now, log into my account and print the PDF version of the tickets on my own printer.
So, under the new system, I will get a "card" and will show/scan the card at the turnstile.
If I can't or don't want to go to a game, I can print the tickets myself to that specific game and sell them on STUBHUB.