Last weekend, I was in Budapest. There is no Uber in Hungary (anymore), but the main taxi company (Fötaxi) has its own app which works brilliantly.
I honestly see no "moat" around Uber in markets where (large) taxi dispatchers have the insight to build a ride-hailing app.
It's only a matter of time before we are back to square 1, or rather, square 2.0:
* licensed, regulated taxis, either independent or through dispatcher * all connected to an (api-)interconnected ecosystem of ride hailing apps * payment to driver directly (cash or card), tipping discretionary * receipts emailed to rider afterwards, with annotated map and start- and end time
This will weed out dishonest drivers, and will benefit honest drivers.
Uber's only differentiator in well-organised urban markets is its app.
The turning point for Uber's decline will be when NY and London mirror Uber's functionality in their own apps, with the benefit (in London) of cabs being allowed to use the cab lanes (or, in Amsterdam, the bus lanes).