Seems to me that Kursk drained the strength of German armored forces to a point they never really recovered from. The Germans at Kursk accomplished very little for the amount of forces they lost, whereas the Russians had enough reserves to be ready to go again right afterwards (noted by Za).
Production levels continued to increase after Kursk, but the pool of armored reserves lost wasn't easily replaced.
The Russians and Germans did more or less fight each other to a standstill at Kursk- a standstill that doubled as a major defeat for the Germans, given the circumstances.
