It would be great if energy could all come from the renewal sector, but even in Germany, where they have gone for wind energy in a big way, they seem to be recognising its limitations now.
http://thebreakthrough.org/index.php/programs/energy-and-climate/germanys-green-energy-bust/
"But statistics on Germany’s electricity sector for the whole of 2012 are now in, and when you look beyond the cherry-picked hype, the results are dismal and disquieting. Despite massive construction of new capacity, electricity output from renewables, especially from wind and solar, grew at a sluggish rate. Germany is indeed avoiding blackouts—by opening new coal- and gas-fired plants. Renewable electricity is proving so unreliable and chaotic that it is starting to undermine the stability of the European grid and provoke international incidents. The spiraling cost of the renewables surge has sparked a backlash, including government proposals to slash subsidies and deployment rates. Worst of all, the Energiewende made no progress at all in clearing the German grid of fossil fuels or abating greenhouse emissions—nor is it likely to for at least a decade longer."
The other point to make here is that it is not cottage industries profiting from renewables, but our friends big business once again. Evil or not it requires serious investment to make renewables more efficient. It will come, but we still have a long way to go.