I just do not see why uber can be disruptive AND follow the rules. Here in Sweden they are lobbying to get exception from the rules, i.e. not having a meter and not having price comparisons on the cars. It's not hard to be disruptive if you break the rules
But why require every car to have this bulky fixed function meter device when a smartphone app can do the job just as well? Sometimes the rules themselves need to be disrupted.
Can it? GPS isn't to be relied upon, and a bad actor can mess with it pretty easily.