I knew I had read an article where something like what you had been describing had been done in an Intel article, and managed to locate the link. The article doesn't seem to be specific to Unity, but Unity can import a range of 3D object formats, so the knowledge in the article should be transferable to Unity.
https://software.intel.com/en-us/articles/getting-realsense-3d-characters-into-your-game-engine
You may also be interested in this app in the RealSense App Showcase wwebsite for scanning bodies into 3D. It works on both the F200 desktop camera and the R200 mobile one.
https://appshowcase.intel.com/en-us/realsense/node/8178?cam=r200
If you wanted to develop a mobile app, I'm guessing that you would want to be using the R200 mobile camera for tablets, and soon smartphones. These devices will usually be Android-based. An Android version of the RealSense SDK is forthcoming. It may be feasible in theory to create an app in Unity and export it as an Android app, but I don't know if the RealSense camera would function correctly in the published app. One would hope that when the official Android SDK arrives, it will support development in Unity and export from it.
