I've been trying to figure out more about the Play Disney App and the roleplaying it involves. Apparently, it can actually do quite a bit.
First of all, it's sort of Disney's version of the Harry Potter wands. You can interact with droids, doorways, and ships. One guy said he "hacked" the Falcon and it actually opened an exhaust port and made noise.
Second, it offers the chance for die-hards to learn more about the backstory of the land and its characters. Apparently, there are all kinds of easter eggs and references sprinkled throughout the land hidden in Aurebesh, alien languages, and hidden signals that can be decoded using the app.
Third, there's an ongoing game throughout the land that you can join in. You're supposed to track down various control panels and take control of them for the Resistance or the First Order. Ideally, this will create a constant tug-of-war that will be continuously shifting control of the village between the two sides. This is the closest they have to come to delivering a truly immersive roleplaying game.
Finally, the app is how they can track your "reputation" throughout the land. If you open the app and join the game while in line for the Falcon, it should add the credits you earn on the ride to your account. And, according to one article, if you sit in a booth in the cantina with the app open, it will actually communicate with some lights on the walls that will tell CMs what kind of reputation you have. This is how you could have a bartender remark on your performance flying the Falcon. Unfortunately, it seems like this kind of interactivity is impractical in these crowds, because I haven't seen anyone mention experiencing this kind of conversation yet.
Right now, it seems like the consensus on the app is that it's very limited (and glitchy) in its current state. But it sounds like the framework is all in place for something truly special. It might take a few years to really take advantage of it due to the overwhelming crowds, but I think it will be worth keeping an eye on this "Datapad" experience. We could see some really groundbreaking stuff come out of all this.