Best technological advances

I have 2 favourite. The Virtual Reality  and the Augmented Reality, these two are very popular in videogames but they have more applications and advantages.
 AR brings elements of the virtual world, into our real world, thus enhancing the things we see, hear, and feel. Applications of augmented reality can be as simple as a text-notification or as complicated as an instruction on how to perform a life-threatening surgical procedure. They can highlight certain features, enhance understandings, and provide accessible and timely data. 
Virtual reality is the creation of a virtual environment presented to our senses in such a way that we experience it as if we were really there.