Since there will necessarily be overhead in any kind of finished design, this "threshold" is an arbitrary one to pass, no more significant that 90% or 125%, or any other round number.
We don't have a commercially viable technology here yet, but we've proven that it's at least viable for the part that needs to produce energy actually can produce energy.
As I understand it, now we start down the road of improving the ratio and optimizing the process.
FWIW, from my lay perspective it seems like the research NIF is doing is significantly smaller scale than the work being done elsewhere. That's a good thing in this case, because the output:input ration - the Q - seems to increase exponentially relative to input power.
It is an obvious necessary condition that input power < output power, however merely satisfying this could have no special practical significance for any design that could end up being devised. The obviousness of that condition is what makes this a PR accomplishment only.
sounds more like someone tells you “hey, I finally found how to do fusion, I just need one more thing, a super efficient laser that no one has built before”
