This hasn't even been announced publicly, but I stumbled upon this because I was part of a flat fare beta group in Chicago. They're about to roll out flat fares nationwide (in important cities). The pricing is so crazy low that it has to be in response to the whole delete uber campaign. Irony is, you can make uber lose way more money by purchasing a flat fare package. It's $10 to lock in the rate for 20 rides. The flat fare varies by city, but LA for instance is $3.99 for uberx. Which is pretty insane. There's a few restrictions, you have to stay w/in the zone which is generally city limits minus airports. It covers rides up to $30 (after that you pay the overage). But you are not affected by surge.
There may be other cities too, but these are the cities I punched in. Just alter the URL to see if it's in your city.
Chicago: https://www.uber.com/info/plus/chicago/
Boston: https://www.uber.com/info/plus/boston/
NYC: https://www.uber.com/info/plus/newyork/
LA: https://www.uber.com/info/plus/la/
Miami: https://www.uber.com/info/plus/miami/
Seattle: https://www.uber.com/info/plus/seattle/
Philly: https://www.uber.com/info/plus/philadelphia/
DC: https://www.uber.com/info/plus/dc/
San Fran: https://www.uber.com/info/plus/sanfrancisco/
Denver: https://www.uber.com/info/plus/denver/
Typical finders fee is 15%. Let me know if you need my paypal. Your $30 uber from Brooklyn to Manhattan just became $5.99. Commerce Casino to Santa Monica? $3.99