Say, for example, you've decided to attend an extra-curricular work function, and you've got a car. With the new feature, you'd be able to indicate you're willing to offer rides. You could also use the feature to find transportation.
The company even lays out a scenario where a driver can generate a map of passenger pick-up locations.
Facebook's Messenger app was updated in December to give users the option to hail rides from car services within the app, and Uber was the first service available to users.
But if we're being reasonable, there's a pretty big difference between simplifying carpooling logistics and running a full-on transportation service.
So, Uber. Maybe, maybe don't watch your back.