The iPad has revolutionized the world of tablets from an expensive product to a relatively cheap affordable and good-looking product. Apple upgraded the iPad today at the Yerba Buena Center in San Francisco, CA. It will feature Retina Display, an upgraded GPU, 4G LTE connectivity, and a 5MP camera.  It will not feature Siri like in the iPhone 4S.  Also the front facing camera will not be upgraded.  Battery life, according to Apple’s estimates, still comes in at ten hours.