There was a TV series based on that idea; it got weird after a while but does point out some of the complexities of living without power. The show is called Revolution and came out in 2012.
Personally though, I doubt a majority of people would be able to survive long due to complications of getting fresh water, food, not to mention medical care, etc.
How long would you live if electricity for the whole world went out permanently?
I was having this conversation with my daughter and thought it was an interesting topic....