Some thoughts from a PM I sent to Supercheese last night before he started this thread
1. Agreed that FIRS would be the goal, but there are other industry sets as well, not to mention the base industries if no industry GRFs are present.
2. Agreed that Andy seems to have used up all his slots, but I get the impression that he will be flexible with respect to his new "economies" concept.
3. If Andy, Pikkabird and George see a "power" infrastructure in action, they may be more apt to consider it for their own use.
4. It will be easier to start with the default industries as not all slots are used up there as well as I don't think all three input slots are used in every industry.
The first obstacle is that a cargo class and label would have to be created. One would want to avoid having box cars or gondolas carrying loads of electricity.
Speed might be an issue. I don't think that TTD/OTTD can handle light speed (yet?). A way to overcome this would be to have lots of vehicles running close together each carrying very large loads. Might even get a decent sine wave out of this.
Power lines are the "roads".
Transmission towers are "signals" to enable spacing between "vehicles".
"Current" is the vehicle. Speed is measured in Amps (Amperes)
"Power" is the cargo. Weight is measured in watts or kilowatts or megawatts.
Substations (Transformer Yards) are the stations.
For "proof of concept" I suggest using only the Coal Power Plant and the default Factory at first. The other default industries can be added later once things are flowing smoothly. After that it would be up to the other set authors to buy into the concept.