This is not very impressive as a step to a power source- cold or tabletop fusion is not really new, but the media jumps on it as a hot story every time it gets mentioned...

Quite a few years ago Dr. Ditmire created fusion in the lab by firing short laser pulses at cold clusters of deuterium. The laser stripped electrons out of the clusters leaving a cluster of positively charged nuclei that then underwent violent coulomb explosion, atoms collided and fused...

Again it was nowhere near breakeven, maybe it is a useful source of neutrons...

Another team at ORNL claimed to have gotten fusion by inducing sono-luminescence in deuterated acetone- Their first paper in Nature was a joke, their science was sloppy and their claim was not convincing... they followed up with a second paper that was more convincing... again it wasn't anything that could provide power...

These are not amazing claims, its just that the media makes it sound that way...