The Autonom Cab is essentially a smaller, higher-speed version of Navya's self-driving shuttles that have been roaming around the University of Michigan and will start plying Las Vegas' roads tomorrow. While those drive at around 15 miles per hour, the Autonom Cab will zip around city streets at an average of 30 mph, carting people to and from their destinations. And just like the shuttles, the Cab doesn't have a driving wheel or pedals, meaning it's built to be level 4 ADS-DV autonomous and require no human input to move.
Navya's just introducing a new vehicle, not a service; They're leaving all the ridesharing infrastructure heavy lifting to companies that want to buy the Autonom Cab. But given the inroads Navya has already made in University of Michigan and Las Vegas, they could get their new self-driving taxi on more US streets.