A remote-controlled kilogram-scale flying system has been assembled. It includes an immensely powerful supercomputer with image processing capability. It can be made to fly right, left, up, and down. It will probably be able to fly 50 MPH for 12 hours without refueling. Most of the components were built by directed molecular assembly (biopolymers) in a very complex process.
Unfortunately, we cannot claim this as a success for molecular manufacturing, because the only part designed by humans was the crude high-level control system. I say "crude"--it's impressive, and a bit scary, that it works at all. And it will likely get a lot more sophisticated. Although the embedded nanocomputer's computations are not presently accessible to the researchers, unrelated research from 1999 suggests that vision-processing information can be extracted.
The article did not suggest whether the system might be weaponized. But similar systems have been used for hundreds of years to transport small payloads such as messages. And somewhat related systems were proposed and even tested as weapons delivery mechanisms.
I am normally skeptical of the high expectations placed on biomimetics. After all, airplanes don't have feathers. And attempts to integrate natural biotech with engineered nanotech are likely to suffer the limitations of both fields. But this story makes me think that some "found technology" may actually be useful when properly integrated with micro- and nanotech.