"It will take "a few more years" before the robo-flies will be able to carry a power source". I'm not so sure. I have a feeling that if these can be made even

"It will take "a few more years" before the robo-flies will be able to carry a power source". I'm not so sure. I have a feeling that if these can be made even smaller, it would effectively require less power than it currently needs. Right now, the material weight is adding a proportionally greater burden to the wings and the required power goes up. but if these can be made with even lighter materials and in even smaller scales, they may be able to scavenge solar power or receive wireless power via radio waves. In fact, it's exactly these types of gadgets that can benefit the most from wireless since they just need to waft into the vicinity of a transmitter to absorb energy. A smaller battery (or super capacitor) can store it quickly before it has to move away to do whatever job it needs to do.