If some new technologies can bring as much bad as good here are 2 that will definitely find a place in our world. The biggest problem with these kind of new things is the cost and therefore availability for bigger audience. If that issue can be solved then there could a lot of good things coming. I especially like the idea of Gravitylight. It might not mean much to people living in the modern world but there are millions of people for who this can literally be a lifesaver.