Hard to predict winners in this market, since startups are usually tied to a technology, and at the moment there is no clear technology - be it ethanol, or hydrogen, or lithium batteries - that is the clear solution / winner. Also, most of the initial changes in the energy market may come from energy demand reduction efforts (insulation, alternative building construction practices, intelligent electronics/appliances that avoid running during 'peak' consumption periods) which may not be captured in "Energy" stocks.
Also, small co's are competing with the likes of GE, and so on.