By "nuclear battery" do they just mean the same kind of battery we've been using in spacecraft for over 70 years?

https://en.wikipedia.org/wiki/Radioisotope_thermoelectric_ge...

"...our robotic proxies can endure the chill and make the trip, and, as it happens, we humans are getting pretty good at making these machines."

I wonder at what point personal robotic proxies into the solar system becomes a <$10k proposition.