You all heard about the Do Not Disturb mode on smartphones. Sometimes people enable the mode to be turned automatically when they enter the car, but sometimes people turn their internal do not disturb mode without any smartphone feature and just focus on driving. It's definitely beneficial and I see an opportunity here.
Since we tend to turn the Do Not Disturb mode while driving and focus on the important stuff, it could be turned on while commuting of any type (car, bus, taxi, train). At the same time, stuff that is important to us and/or that we "save for later" could pop up. If we are driving, the stuff would be read out loud, but if we commute on a train, we could be awarded by saved, filtered, and personalized content that a phone kept for these moments. That would make us anticipate every commute to find out what cool personalized stuff did the algorithm brought up this time :)