We can improve anything to the degree we can measure it...
We can improve anything when we have more people measuing it.
Our problem with electric powered devices is energy density. For electric cars the combination of space needed to create and then store the energy is greater than using fossil fuels to get a shaft to turn. When we learn how to create sufficient electrical power to power an automobile using less space than a fuel tank and 30% efficient fossil fuel heat converter than we will rid the landscape of electric generating power stations.
We need better ways to measure how electricity is generated. Today we know electricity is not a natural form of energy therefore we need to learn how to transform natural forms of energy to electricity using a smaller foot print.