The problem I see with this is there are more potential earnings locked up in demonstrating that new plant is needed. Batteries, like distributed grid and demand response, take that earnings stream away. My guess is wide adoption will be super slow, for two reasons. One, we overestimate the savvy of utilities (in recognizing the arbitrage before them). Two, people tend not to reach for long-term savings, through high, up front costs. On the corporate side, most utilities see the earnings path through their regulated businesses, meaning away from the operating costs of their generation. Strategy follows the monolithic path of testing regulators, to see what can be passed on. A dollar of legitimized cost, turns into $1.10 of recovery. A dollar of savings? What to do when EIA is saying the sector's growth rate will be just 0.7%/yr? They're challenged.