They need to prove that the research works to actually produce net electricity - which requires a scientific breakthrough. Next after a research breakthrough - they need to make this a product -- then a commercial product. During that process they need to make this a commercially viable economically viable product that can compete against other forms of energy in the marketplace. They will need to get through serious regulatory requirements. And remember that they need to make this commercially viable to produce electricity at a very low cost - its super competitive at baseload power cost range.
By the time this comes to market the energy landscape will be completely different. It is already moving incredibly quickly.
Like I've said on other post - we need these kinds of moonshots but let's not have them distract against the other important work of deploying already commercially ready technology into the market.