Not sure whether you're tongue-in-cheek there, 11.4.
In any case, if you have the power unit to actuate the caliper at the brake, why would you not drive it directly, without going via hydraulics?
There are already interesting prototypes in testing. All the connectivity can be run internally. It lets you program your braking, which actually gets to be quite amazing. Weight is a lot less because of all the housing/fluid/piston chamber etc. that you can dispense with. I've seen two versions, one feeding off a shared battery (actually, off the same seat post battery as the shifters) and one with individual batteries in the two units for redundancy. It really doesn't take much power so it's more a question of how paranoid the market will be about brake failure due to drained batteries. There are all kinds of backup and warning systems worked into it already. You'd have to be far off in the wilds to have any reason to worry. Just look at what autos have, not to mention aircraft -- there isn't a hydraulic piston under your brake pedal any longer. And when you consider the number of brake failure modes you can have right now with hydraulic lines, you actually simplify and increase the reliability of your brakes.