RE: Amazing payment system in public transport in Bucharest, Romania. This is how it should be. "In Time" sci-fi vibe.

We have the same thing on buses and trains in many parts of Australia. I've had a "pay-wave" bus ticket (the same one) since university, some 15 years ago. It's just a RFID chip that is reloadable - but you can tap and pay with phone or credit card, too.