So it sounds like the first application of these projectors could be to replace computer screens with small projectors that can create a large display anywhere. A small camera (already incorporated in the smartphone) could be used to monitor the position of a pointing finger and create a full size "touchscreen".
There is a smartphone picoprojector on the market already, at least for the iPhone. Check out Pop Video, here's a review of it. This thing looks great.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.