1) What previously existing libraries are you using (if any)?
2) Since the video capture (assuming it's from the tablet's camera) is detached from the depth capture, how do you coordinate the two to make the grid layout in the video? Structure.io seems to require attaching the depth device to the video device (so the perspectives are relatively fixed).
Some open source projects it uses: Eigen, OpenNL, OpenMesh, OpenCTM, GLM, Protobuf, Redis, Gluster, Node.
2) Video capture is actually from the RGB-D sensor, so it's registered with the depth. I believe the Structure sensor requires that the camera is fixed to the mobile device so that its IMU can be used for tracking. No such requirement here.
Before it could happen, though, I'd need you to ship my Structure Sensor USB cable and for you to release either an Android, Linux or Windows SDK. Hope that'll happen soon.