This already exists in Chicago at least - just using Android Pay though. I know they also have been working on an app as well, but I haven't paid attention to

This already exists in Chicago at least - just using Android Pay though. I know they also have been working on an app as well, but I haven't paid attention to it once they got initial NFC payments working. I do know transfers do not work with android pay (I imagine due to rotating card numbers), but luckily I don't have to deal with that and Yet Another Silly App. I will say it's quite great. The time is very near where you can leave your home with only your cell phone as the single item you need to remember. Also scary in that if you lose that single item, you are getting increasingly more screwed. That is now my transit pass, money, taxi ride, and front door key.