Scan and draw ruff sketch of distances ahead just like RADAR using UltraSonic Distance Sensor.
Garage door control using a PiFace Digital 2 and Raspberry Pi 2 running Windows 10 IoT via AllJoyn/AutoRemote/IFTTT/Adafruit IO.
Monitoring the heart rate of somebody, and alerting somebody else when the heart rate is out of set range
When someone show in the camera which is run on Raspberry Pi 2 with Windows 10 IoT Core, your phone will get notification that who it is.
Use machine learning with IoT to identify and connect with common scenarios in life (for example, webcam-based door security).
Acoustic Localisation using TivaC Texas Instruments launchpad.
Simple Underwater explorer with live camera feed to control device. Can also be used to build generic remote control applications
Track and create custom objects, like switches, across a room with a camera, so that one can open up new interaction models in IoT space!