Changing the world in some massive way like Gates/Jobs did, can you imagine the world today without personal computers? Seriously, Facebook could disappear tom

Changing the world in some massive way like Gates/Jobs did, can you imagine the world today without personal computers? Seriously, Facebook could disappear tomorrow and the world would hardly notice; if PC's disappeared it'd collapse. I don't know what the next earth shattering thing will be, but it ain't Facebook.