Didn't know this realsense camera technology already exist in current Dell Venue tablet lineup:
Here's an excerpt by Tom's Hardware:
RealSense cameras feature three lenses, a standard 2D camera for regular photo and video, along with an infrared camera and an infrared laser projector. The infrared parts allow RealSense to see the distance between objects, separating objects from the background layers behind them and allowing for much better object, facial and gesture recognition than a traditional camera. The devices come in three flavors: front-facing, rear-facing and snapshot.
Right now, the front-facing cameras are most common, appearing on a number of new PCs and allowing all kinds of gaming, gestures and communication. Rear-facing cameras will arrive on tablets later this year and focus more on 3D scanning. The Dell Venue 8 7000 tablet is the first device with RealSense SnapShot, which is made just for still photography and allows you to change the focus or measure real distances in a photo after it has already been shot.