What I'd really like to see is a replacement for Lipo's. Quadcopter tech has grown quite a lot in the last couple years, but the batteries are holding us back. Lipos are ancient as hell, been around since the dawn of the RC hobby. If we could getting something new that gave more power with a full day's worth of flying in 1 charge.... <3
May sound unbelievable, but so did being able to fly around with a pair of goggles not too long ago!