It's difficult to keep track of how many pieces of concept technology are thrust into the public domain, only to then fall by the wayside and never actually make it into real-world production. Some of these examples are designed to purely embrace being a concept, and are often based on technology that doesn't yet exist, hence why they never come to fruition. Some on the other hand, such as this excellent Samsung Smart Windshield, are concepts designed to solve a specific set of problems and are actually capable of being put into production thanks to the existence of the underlying technology.
