Then read it again. It specifically mentions a HIGHER UTS (which you very rarely design to anyway and isn't that useful compared to yield).
BTW being lighter and stiffer doesn't mean the material has to sacrifice quality in other areas. It often DOES but it's by no means guaranteed since there is a massive diversity of Al alloys available all with differing costs, strengths, stiffness and density. God knows what material K-alone actually is, although I imagine it's an exotic example of 6000 series, but to me it's more of a marketing ploy than a technological breakthrough.