Electric cars have come a long way but are still far too expensive and limited to the rich for toys.
Delta hopes to get EVs driving further with turbine power, the big advantage of using a turbine is that they prefer to run at a set speed which makes it more economical and cheaper in providing power for a generator to keep batteries charged.
IC engines are best for cars as they can be operated at a very wide range of RPMs, which is not required to when powering a generator
People with a long memory may remember a Rover with a turbine engine back in the 50s --Rover jet?