Energy conservation and networking is the way forward.

A passive house can be heated just by turning on the telly, even if its freezing outside.

And no, electric cars and such do not pose an energy problem, as it will reduce the total ammount of energy required. The combustion engine in a car only utilizes around 15% of the energy in gas, the rest is simply wasted. A power plant, on the other hand, utilizes around 95% of the energy in that very same gas.

If we were to switch all cars to electric cars now, the energy savings would be a number bigger than what I can write.