So, you know how everyone's been waiting for the robotaxi future to actually arrive? Well, Uber and Nvidia just put a much more specific date on the calendar. The ride-hailing giant and the AI chip powerhouse announced late Monday that they're significantly expanding their autonomous vehicle partnership, with plans to launch a global fleet of entirely Nvidia software-driven robotaxis.

The target? The first half of 2027. That's not some vague "someday"—that's a little over two years from now.

The plan is to start in the classic AV proving grounds of Los Angeles and San Francisco, then expand the service to a total of 28 cities around the world by 2028. It's a bold roadmap that suggests both companies are moving from the research and development phase into serious commercialization mode.

"Autonomous technology holds enormous promise to make transportation safer, more reliable and more accessible," said Uber CEO Dara Khosrowshahi. He framed the expanded partnership with Nvidia as "laying the foundation for an increasingly multi-player AV world" and helping to bring robotaxi service to more riders over time.

On the technical side, the fleet will run on Nvidia's DRIVE platform. The key new ingredient is something Nvidia is calling "Alpamayo," which the company describes as a reasoning-based AI model built specifically for autonomous vehicles to handle complex, real-world scenarios. Think of it as the brain that has to make split-second decisions in messy traffic, not just follow a pre-mapped route.

The rollout won't be an overnight flip of a switch. The companies said they will deploy in phases, starting with a data-collection phase, then moving to an operator-led launch (meaning there will still be a human in the driver's seat as a backup), before finally progressing to fully driverless, or "Level 4," deployments.

Nvidia founder and CEO Jensen Huang, never one to shy away from a grand pronouncement, tied the moment to the AI explosion. "The 'ChatGPT moment' for physical AI has arrived," he said. "Robotic systems can now reason about the complexities of the physical world." In other words, the AI that can write a sonnet can also, in theory, navigate a four-way stop.

Investors seemed to like the sound of this accelerated timeline. Shares of Uber Technologies Inc. (UBER) were up 3.12% in after-hours trading Monday, changing hands at $76.99 at the time of publication according to market data. The news also keeps the spotlight on NVIDIA Corp (NVDA)'s expanding role beyond data centers and into the physical infrastructure of transportation.

It's a partnership that makes a lot of sense. Uber brings the massive global network of riders and vast operational experience. Nvidia brings the cutting-edge silicon and AI software stack. Together, they're betting they can build the hardware and the marketplace for the driverless future, and they just told everyone when they plan to start picking up fares.