It remains to be seen whether this will ever be more than a lab curiosity: Just how much heat can they generate with it? Note that producing enough heat to be worth talking about means producing enough neutrons that you aren't comparing it to background radiation, you are worried about shielding the thing so you don't kill yourself.
That is the other dirty little secret of fusion research: It is nowhere near as clean as the researchers claim. There is a lot of neutron radiation and the corresponding danger of creating radioactive isotopes. Once the greens figure this out, they will shut it down just as surely as fission.