Hotel: check in to room immediately without even going to front desk, even if its 3 am.

Airline: instant update of gate changes. When you need to sprint to make your flight because thr gate changed to one a half mile away, this is something you can't live without. TVs are getting less and less in airports now. Also, literally no one uses a paper ticket and I suspect they'll be phased out completely in 5 years. Too easy to fake.

There are people alive today who have never once written a check (I do, often), so you can kiss all of our old analog paper ways goodbye in a few years.