Those are not mobile. But 35-ish TDP mobile Quad cores from Intel have already been a thing. For some reason Apple hasn't been interested in putting them into rMBP 13.
Main reason I think is that they believe most buyers of "Pro" don't really need quad-cores, and would react mostly negative towards the noticeably worse battery-life that Intel's quads currently bring. But that shouldn't have excluded it from a built-to-order option in my opinion.
I waited and waited for years for a 13-inch quad core to be released. Gave up. And since I just gave up I'm sure that the next iteration will have a quad-core option