I'm waiting for turbine driven hybrids.
Turbines are theoretically much more efficient than traditional combustion engines. They have smaller power/weight ratio and they are very well suited for producing energy for long times at static rpm, but they are not as good in fast acceleration, so driving a turbine car in urban area is a little frustrating if it's hooked directly into transmission.
That's why in urban area, the turbine charges batteries and produces also directly power for electric motors. In highway driving, the turbine will be hooked directly into transmission to avoid energy conversion losses - static speed is not a problem for a turbine, and highways consist quite much of static speed.
Every time the speed gets below certain point, the turbine is deattached from transmission and electric motors move the car again. Electric engines also provide fast acceleration, whenever it is needed.
We'll just see how much the Finnish government keeps the insane taxes on anything used to drive a car that is not gasoline. Because that's what they are doing here. Reason to that I can only guess.
