The problem for Nikon is they came out with this Canon-smashing tech after DSLRS gor 'good enough' for the vast majority of people.
When we were going from 4-8-18 MP, there was a noticeable difference. Same when ISO's in the 800-1600 range are vastly different between brands. Now? Sure gear heads will pontificate, but for the rest of us it is more of a 'would be nice' thing.