Behavioural Adaptive Driving
Lately I'm being interested into hybrid cars.
It seems that you can optimize your fuel consumptions with some careful driving, like anticipating an impending slope or recovering energy from braking before a stop.
I think there's some room for improvement: with a GPS, a street map with altitude information also, and by recording usual routes with an onboard computer, the system may suggest actions or even control the engine to cope with incoming kinetic energy demand or surplus.
So, by learning daily commute habits, the system may know that 500 meters from now, you're going to brake at a crossroad, so it may be possible to stop the engine from charging the battery, as it will be charged anyway by the impending brake.
I'm just writing it here now, so I can become a patent troll in the next few years when this idea will be implemented.