Or are they, and I just haven’t seen them yet?
I’ve been taking a lot of taxis lately, in a number of different countries. The specifics differ, but in general there are at least two different devices in use in the cab - the meter that calculates the fare, and some sort of dispatch/communications device for sending alerts and messages to the cab drivers (and presumably for the drivers to respond). Sometimes there’s a third device for swiping credit cards (sometimes this is incorporated into one of the other devices). Very often, the driver also has a GPS device, or his own tablet or smart phone that he’s using for navigation, texting, etc.
Seems to me a single tablet with the appropriate software should be able to replace these dedicated devices. Granted, I have never driven a cab, but I can’t imagine that it would be insurmountably difficult to write the software to handle fare calculation (and make it as testable, verifiable, and secure as existing meters). Square (or a similar device/service) can be used for collecting fares from a credit card. Mounting a tablet in a car is much less time-consuming and disruptive to the car than some of the hardware I currently see, and it would seem that replacement of defective devices and updating of software would be much simpler than the status quo.
Are the economics just not there yet? Entrenched mindset on the part of cab companies? Do solutions like this already exist, and they’re just taking time to roll out? Or did I just give one of you a good idea for a new product to take to market?