Mind you there is nothing wrong with cable operated or hydraulic brakes, both technologies are reliable and work well. An area that could use some improvement with electronics is shifting, in that with modern precise shifting mechanisms, cables can easily get far enough out of adjustment that shifting no longer works. One possible electronic solution would be a box that sits at the junction of the down tube and seat tube, this unit is powered by a generator hub, the unit then sends power to the shifter which becomes a simple 3 pole switch, when the switch is moved to the shift-up position, a small stepper motor turns a preset amount, and pulls or releases a cable to the derailleur, since the cable is only about 1m long, it would better stay in adjustment. Adjustments would be made not to the cable, but via a dial on the control unit.