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I don't know where you'd have room for one of these but no room for something like the D435 which has a resolution of 1280 × 720 on the depth side and an RGB sensor. Maybe robotic vacuum cleaners or something.

It is like a fancy occupancy sensor, 24x24 over that huge volume and only 15fps.

These are fundamentally different technologies, the camera you linked uses structured light and stereo vision + ML to get depth. It has an order of magnitude less range and an order of magnitude more error. The Sony sensor is time of flight SPAD, it's much closer to giving you a ground truth you can trust than the Intel camera and much more capable of rejecting environmental noise.

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