Internet gave me so much good the past few years. Were it not there, sure I would have found other things to do. But take it away from me now, and life would become very barren indeed.
Cars, yes, I can live without, but only because I live on the route of a very good public transport line. Would want one if I lived in another village.
Of course people would survive without, as a species. But I do wonder if the earth could sustain as many people as it does now, without all the modern things. The modern things come with modern ways of destruction too. Nothing is good in itself.
Evolution and developing into a more modern society will not improve humankind, it is about adapting to the time where you live in. Longing back to prehistoric times will not help the world as it is now.
One 'consolation', in two-hundred years, the world will be completely different from now, but humankind will not have improved, just changed a bit.