The whole AMD/DMP thing doesn't make sense.
These are two different companies with completely different architectures, the DMP chip is nothing like the Polaris chip (even setting architecture aside), any more than the 3DS chip is similar to the Wii U chip.
This is just SMD64's wishful thinking, it certainly wouldn't be a cohesive ecosystem of any type, not any more than Vita and PS4 are (for example). iPad and iPhone are a central ecosystem because they basically use the same family of processors (A9 and A9X for example made by the same company, basically the same chip just scaled up or down a bit).