Nobody will spend $300 for the APU + $200 for a motherboard + $150 for Quad 2400MHz memory because it is the fastest APU in the planet. Nobody buys Core i3 for its HD4600 graphics because Iris Pro is the Fastest APU. Mainstream market doesnt even know what Iris Pro is.
Even if AMD would release a 300W APU monster, it would not effect mainstream APU sales.
From my point of view, what AMD lucks is production Volume. They have released Jaguar in June and still you can't find a single Desktop/Laptop Jaguar product in retail. They already have excellent products but you cannot find any of them to buy.
And even if you find one like the
ECS KBN-I/5200 mini-itx board, it cost more than a cheap FM2+ motherboard + Trinity/Richland APU. Those boards should be bellow the $99.00 mark and flood the market. But instead they are hard to find and very expensive because they are not consumer products but Embedded.