Just been reading about the use of micro gas turbines as the new way of producing electricity to power hybrid vehicles.
One of, if the the biggest issues with Turbine engines in a motor vehicle, has been how to connect the engine to the drivetrain. Anytime power is converted to another source, there is energy loss, and this has always been the stumbling block thats kept the turbine out of cars. The Turbine has the capability to be the most efficient powerplant, far exceeding the diesel. But its found its greatest use in applications where the engine could run at more or less steady speed, such as driving helicopter tranmissions and aircraft propellors.
i am not sure how a gas turbine would work in a urban commuter scenario, you wouldnt want to be starting and stopping it, and they are not efficient at all when idling. But out on the road, I could see a gas turbine electric being very very miserly on fuel. And powerful when needed.
Like you say, give time its measure, someone will think of something. In the mean time...drill baby. Drill!