Amazon, at long last, is set to launch a smartphone with a glasses-free 3D "holographic" display. Invites were sent out late yesterday for a special launch event on June 18 in Seattle. Accompanying the invite was a hilariously awkward teaser video (embedded below) with the new device just out of frame, with a bunch of starry-eyed first-time users wobbling and bobbling and gyrating to trigger the screen's 3D effect.