In order to count as "full self driving", it must be at least as safe as a normal, reasonably cautious human driver averaging over all situations, proportional to their likelyhood. In other words, assuming I'm an average driver (and not drunk, etc.) and am not irrationally scared of self-driving cars, I would feel no less safe saying "drive from my house in Florida to this hotel in Atlanta" than I would doing the drive myself. Must be available to the public, but doesn't have to be cheap.

In order to count as "self-sustaining fusion", it needs to either:

• Actually be self-sustaining; i.e. they could turn off power to the reactor and it would keep going.

• Output no less electricity than it took in, even if that electricity is not what's being used to power the reactor. (If the energy input was not all in the form of electricity, conversion losses must be factored in. It should theoretically be self-sustainable.)

It doesn't have to be economical, nor does it have to produce any extra power.