They will be powered by rats running on a wheel
The lights in the eyes will be generated by tiny monkeys coming up with ideas
The BEEP noises will actually just be from the robots trying to sneaky out silent guffs
Actually, it's much more likely that robots in the future will just be cats wrapped in foil
unfortunately we'll have to wait for future technology to be invented so we can safely wrap cats in foil without them hating us forever! Please don't wrap your cats in foil until then!!!