They have significant potential. The issue is how the cost curves of all these various technologies evolve over time and whether they become cost-competitive. There's a competition among renewables themselves as well as against conventional sources of electricity generation such as hydro and natural gas. So it really depends on the assumptions and the progress that's made in reducing costs. You clearly see the cost reductions from some of these technologies. It just becomes a question of when they will reach parity with other things. But premium electricity companies are willing to put on alternate sources.
On April 18th, 2013. See this statement in context.