Point Grey Research makes stereo and 360 cameras. They aren't really designed for consumer use though. The Nintendo 3DS also comes with a 3D camera.
I can think of a few reasons why you don't typically see this in consumer products. First is cost. You need two lenses and sensors. Second is workflow. There isn't a lot of consumer level software available for processing image pairs to get and use depth data. Third is display. Most people don't have 3D displays for looking at the final result. What else is a consumer going to do with this data? Points two and three combined lead to low demand for a product that does this.
