actually, the technology is available, but the information is not. for example, most people and buisinesses do not know that an electric impact wrench has the same torque and CFM as an air one, while usins approx. 1/6 of the energy. and the Department of Energy is actually trying to get this information out. that is actually who my internship is with. we dont try to find new ways to conserve energy, we just try to let companies know what options are availabe to them.
impact hammers can be an exception to this depending on the size of the tool. smasll ones would be better off electric, whereas large ones do need the power of pneumatics. but even that is begining to change.
one thing that also could be taken into consideration is the environment that tool is being used in. if there is any volatile, combustible substance around, electronics may be a bit dangerous. in fact OSHA looks for this during a plant inspection. also, electronics need to be kept free of dust and moisture.