You've long had the option of scheduling Uber rides, but that didn't necessarily guarantee your fare. It could cost you a pretty penny if there was a surprise surge at the time you hopped in the car. That won't be an issue going forward -- Uber is now locking in fares when you book a ride at least an hour in advance. The price you see is what you'll pay at the end, even if traffic snarls would have resulted in paying more. This could be more than a little helpful if you're booking a ride to the airport, or expect to travel downtown during rush hour and would rather not pay extra for the privilege.