Re: @Bronek @DougS
Now you probably know, why this came to be? Hint: the USB specification said "only 500mA can be drawn from the port". So Apple had to make an extension to the standard. Others followed.
USB Type-C says 100W can be drawn either direction. So I see no reason for Apple to do anything about it. Unless they start replacing the LiPoly batteries with supercaps :)