Algae will be huge for sure. The only 2 things slowing it down now are
1) Low gas prices mean that people forget that in a year from now they'll be begging for an alternative, but for now, investment is waning and...
2) The cellulose ethanol people who spent all that money getting ethanol infrastructure going still want us to believe that the ultra low yields are worth using food to make gas. Once they all finally declare the inevitable bankruptcy, then algae will go gangbusters. It doesn't use food, it produces petroleum, livestock feed and H+, it sequesters CO2, it takes almost no productive land area and it produces oil so fast it's hard to keep up.
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