AMR or whatever subsystem it evolves to also comes in different flavors. Retail business design innovations depend on the whole customer interface.
Len had Gould said:
Given that every customer will still need a meter anyway, AMR is going to happen regardless of market design, and bills still need to be transmitted and collected in any system; THEN I fail to see how IMEUC might pose any impediment to your retailers business design innovations. I proposed the market manager making longterm contracts for eg. baseload etc. only because I don't think many private "retailers" will, but see no reason to bar them from doing so and using the metering system to verify their transactions.