Could 3D printing be the future of office supply stores? Staples, for one, has been dipping its toes in those rising waters, offering a limited selection of devices on its site. Office Depot's following suit, making the seemingly logical move of including the third dimension in its printing offering. The chain announced today that it's added 3D Systems' Cube and CubeX to its online store, selling the printers for $1,299 and $2,499, respectively. It's not quite a 3D printing kiosk in every store (who wouldn't want a personalized Star Trek figure while you wait?), but it's always nice to see a company looking to embrace emerging technology.