[sjayasinghe]

Right, I'm totally with you on this. I only used the light bulb to illustrate the basic idea.

This need not be limited to network-connected devices either. You can define interfaces for any object even if they aren't electronic.

For example you can define the interface for a bottle as something that can be opened. You can define processes based on the interfaces of multiple objects. These process definitions can then be transferred to a robot that will then be able to interact with the real world based on those definitions.