Don't have any numbers for silicon retinas, but the long-term goal IBM's cognitive computers is to simulate corelets on a supercomputer that consumes mega-Watts, then execute them on a cognitive computer that consumes kilo-Watts--1000-to-1 less power.
Regarding power dissipation it should be drastically less, because artificial neurons dissipate very little power except when firing voltage spikes, which typically only occurs every few hundred milliseconds.
Regarding using smart silicon retinas in humans, that would probably be a decade or more away, but in the shorter term the fact that cognitive functions can be built-in should make human-like perception possible for robots.
Drones are, in essence, flying autonomous vehicles. Pros and cons surrounding drones today might well foreshadow the debate over the development of self-driving cars. In the context of a strongly regulated aviation industry, "self-flying" drones pose a fresh challenge. How safe is it to fly drones in different environments? Should drones be required for visual line of sight – as are piloted airplanes? Join EE Times' Junko Yoshida as she moderates a panel of drone experts.