Waymo is a particularly good one. Yes, it's been harder and taken longer than expected to get cars self driving, but it's starting to show real results now, and

Waymo is a particularly good one. Yes, it's been harder and taken longer than expected to get cars self driving, but it's starting to show real results now, and the sheer difficulty could act as quite the moat -- right now in the Western world, nobody is even close to Waymo in operational L4 or higher self driving cars, and the incumbent automakers in particular seem to have mostly given up. And it's not just that Waymo will inevitably expand beyond robotaxis into personal cars as well, they could take their expertise in vision and robotics and apply it to adjacent domains. Maybe we'll actually start seeing the humanoid helper robots of the 50's a decade or two from now!