The power of projection
Projection mapping uses everyday video projectors, but instead of projecting on a flat screen, light is mapped onto any surface, which turns any 3D shape into interactive display. It can be used for advertising, live concerts, theatre and gaming. I came across this video whilst researching about projection mapping. I think it explains it well. I personally have not heard of this technology and have not come across it being used either.
Aurasma is the world's leading augmented reality platform. Available as a free app for iPhones, iPads and high-powered Android devices or as a kernel for developers, it also uses advanced image and pattern recognition to blend the real-world with rich interactive content such as videos and animations called “Auras”. (Wikipedia) I have come across this app but never got the chance to use it. It has also been found to be a useful technology for schools as it adds engagement and interactivity to the lessons.
Connecting Two Worlds
A microcontroller is a small inexpensive computer, usually used for sending input from the real world and controlling devices based on that input. They are found in all kinds of electronic devices these days that stores, calculates, measures and so much more.