The original iPad was an iPhone gone IMAX and the first successful tablet the world had ever seen. The iPad 2 made it thinner, lighter, and faster. The iPad 3 went Retina and LTE but not comfortably so. The iPad 4 made Retina and LTE sing. And the iPad mini showed portability could be just as important as power. Now the Retina iPad mini is as high-density as they come, and the iPad Air has gone light as its namesake. Where does the future lie? For now, with Touch ID and the biggest iPad to date — the new iPad Pro.