LZ Granderson: We need to be aware of how the media is shaping our senses. He says we live in an age where technological change happens so fast that we don't have time to adjust. LZ: Marshall McLuhan came up with this stuff in the 20th century, not in the 17th century. "The world that was created by the smartphone is much more a determining factor than what I'm tweeting on a daily basis," he says.