Keep in mind it's still V 0.1 tech
So it's better than the best supercapacitors.
Supercapacitors are good at high rate dumping and absorbing power. The actual capacity (compared to regular batteries, but not capacitors) is pretty bad.
Perhaps it's 2000x better than other micro batteries, but I suspect most batteries scale down badly.
At micro and nano scales materials can be used that fail at larger scales because their bulk properties (IE their conductivity) are not good at meso scale. They only work at this scale, but the conditions at this scale means they turn an unworkable architecture into a practical power source.
Cautious thumbs up but it's yet another battery chemistry which will need an infrastructure to support it.
Here's the thing. It's novel. That does not equate to better and by "better" I mean against the existing battery form factors and chemistries that are already commercially available.