Except the Ironman style reactor is pure science fiction, whereas hydrogen fusion is real, but still has issues of energy capture, which several groups are working on.

There are two promising avenues, one is a direct physical capture, as in fusion is initiated with huge pistons that are physically moved by the fusion explosion,

And the other cool one is direct magnetic coupling.

I expect both to take off long before the tokamak style does.

But fission power is already here, and much easier to set up. Molten Salt Thorium is also promising. And once some corrosion issues are solved, could power the earth at current levels for the next thousand years.

All while producing an isotope of actinium that produces only alpha radiation. Which is super useful in killing cancer cells.