It's a milestone - a bit more power out than power in - moves fusion from "something that will never happen" to "something that might happen... eventually". It's still not happening anytime we'll be around for, but our kids or grandkids might. No idea if we'll still need it at that point or if we've learned to use the giant fusion reactor our planet orbits a bit more directly than PV, wind, hydro and tide.

David Clark (not the American Bandstand guy, the brilliant guy who ran the MIT networking lab) used to say that it's 20 years from 'working prototype in the lab' to 'out working in the world'. He had plenty of examples. I got to see at least two. I'd use it as a general rule of thumb for technical gear / protocols - and we're not at 'working prototype in the lab'.

BTW one of my coworkers had been one of the power guys on a Boomer. The secret parts had to do with how they made it near-silent. The rest he could talk about - although 20REDACTED is funny. :-)