One thing I like about taxis is the meter itself: If you're stuck in a traffic jam you can check the current price and decide if it's worth staying in the taxi

One thing I like about taxis is the meter itself: If you're stuck in a traffic jam you can check the current price and decide if it's worth staying in the taxi or hopping out (after paying). Is there any technical reason why Uber can't present a meter in the app that you can look at intermittently?