Remember how way back in the 60s or 70s or 90s sci-fi writers wrote scary books and films and short stories all about how computers were going to take over the world, how Hal wasn't going to let us back in the hatch, how Daleks would be much smarter than humans and how soon computers would start to be capable of things that their creators couldn't account for? Like mind control? Obviously that wasn't going to happen.
Only...when was the last time you lived without your computer for a week? A day? An hour?
How soon after you get up in the morning do you check your emails? How many times a day do you check twitter or FB or tumblr or youtube?
How weird and itchy and uncomfortable do you feel when you can't do any of those things for half an hour or so?