Microsoft's Office team has put out a concept video (below) outlining what it imagines in its long-term future. The Productivity Future Vision demo shows a world dominated by touch and gestures, where smartphones are transparent blocks and tablets, walls, and tables all recognize either touch, voice, or in-the-air gestures. It imagines users physically dragging what they're working on from device to device and even includes 3D holograms that go beyond the edge of the display.
