Project Tango doesn't really sound like something that would make for a good consumer device, but that isn't going to stop Google and LG from bringing a Project Tango tablet to consumers next year.
It is another moonshot from Motorola's old Advanced Technology and Projects (ATAP) group that is now part of Google. The idea is to put multiple cameras and sensors on the phone and tablet hardware to allow for full 3D maps to be built.
The potential of the hardware isn't totally clear, but Google has already mentioned benefits for indoor maps. The ATAP team announced today at Google I/O that it is working with LG to bring a consumer model of the tablet to market next year.