Virginia Heffernan: “Speed and expansiveness, to start. On expanse: The population of our ether – users of cell tech and wifi – is now just about coextensive with the population of the earth. This is fathomless by most minds. And speed: The illusion of near-absolute compression of time and space on the Internet is an illusion so beguiling we are virtually powerless to refuse it as real, except for short periods and with great mental or spiritual focus.”