If it's viable we need it to replace the world's oil/coal infrastructure. The world's elite will fight it like hell to prevent it from happening. President Barack Hussein Obama where in the hell are you on this issue. Brother windmills and solar panels are not going to do it all.
Biodiesel from algae is very promising, the byproduct is animal feed and no need to waste fresh water, salty water is fine too. there is another technology where hydrogen and oxygen from seawater can be separated using solar power the hydrogen can then be used as fuel and byproduct is fresh water, that is good way to desalinate seawater. A friend of mine once told me that as global population grows future wars will not be about oil but fresh water.
You have scientists all of the world who has proven that cold fusion works. The problem is big oil will spend is much as it takes to keep this technology suppressed. If the government invest just a small fraction of what they've invested in hot fusion we would have free energy.