Walking into a T-Mobile store soon might feel like stepping into the future. The wireless carrier has teamed up with Samsung to test something that sounds straight out of a sci-fi movie: three-dimensional holographic displays of the latest Galaxy phones and watches. Starting this month, select T-Mobile locations in New York City, Seattle, and other markets are showcasing Samsung’s newest devices as floating 3D images. Instead of picking up a phone or watching a traditional video, customers … [read full article]