There's actually some new breakthroughts that have been made in the last couple years that have pushed it to closer to 15-20 years. A group out of MIT has desig

There's actually some new breakthroughts that have been made in the last couple years that have pushed it to closer to 15-20 years. A group out of MIT has designed a new reactor type that shows promise, http://news.mit.edu/2015/small-modular-efficient-fusion-plant-0810 http://news.mit.edu/2015/small-modular-efficient-fusion-plan... there's also a lecture they did for and MIT alumni association down in silicon valley back in February on YouTube.