Holographicality

Soooooo yeah, I've decided that I want to do something for my navigation interface which includes technology that has not been invented yet, I don't want to JUST do a phone application. At the moment my mind is going along the lines of holographics, let's just assume that in the future the whole world is set up with holographic projectors which people use for everything. It's a way of being connected all the time whilst interacting within the real world.