Cost-effective method of extracting uranium from seawater

> that analysis shows that seawater extraction could be competitive with land mining at present prices.

Price of uranium isn't really the main impediment to more nuclear deployments. Rather its politics and safety concerns etc. So I'd speculate that discovering another (big) uranium mine that costs the same as current mines won't make a lot of difference to nuclear countries.

That said, it could enable all non-landlocked countries to mine it from the ocean. That could change things.