My understanding is the NRW election was mainly a referendum on the non-austerity policy of NRW gov headed by Kraft.
And Kraft (NRW SPD) plus the Greens won big, getting some 50% of the vote vs some 35% for CDU and FDP.
But did the NRW and other state results active the anti-austerity - anti-Fiscal Compact sensitivities in federal SPD and Greens? Das is the question, for Germany, the Eurozone and the EU. And the world economy.