Enlightenment: 'Armless, really.

How cool would it be to have a robotic arm?
Like, from the elbow, it would be all gears and wires and flashing lights and circuit boards. You could have a laser gun in there with an adjustable nozzle so you could shoot through a wall, then make it smaller and use it to point at stuff on a whiteboard. You could have an interchangeable port at the wrist, with different hands, so one day you could have a hand and the next day you could have a GIANT HAND. You could have a velociraptor claw! Or a backwards hand! Or a microphone! Or some kind of tennis raquet or pen or pointer for... more whiteboard pointing. Though I guess the laser would have that stuff sorted. If it fell off or you lost it, you could have a button to press or a switch to flick which turned on electromagnets or something, and it just comes leaping back!
You'd just have to be careful not to spill liquids onto it.
Or lose both your hands, because then you couldn't screw them in properly, unless you use your teeth.