What I don't get:
Why are you ignoring the GPU in AMDs A8-3850 APU? It's called HD 6550D and is capable of delivering 480GFlops (with fast enough memory, like e.g. GDDR5) at it's base clock (which is a lot lower than what is possible because in PCs where this APU is typically used the DDR3-RAM is too slow and so they cut the power of the GPU down; but there's no problem to apply a 20-30% higher clock to it -even 50% is possible but that may result in too low yield rates or too much power consumption).
So you have at least 480GFlops to add to the PS4s graphics power.
edit: and another thing I don't get: Why are you thinking that the Wii Us graphics card will have DP? You don't need DP for anything in gaming. That's more for scientific work. Also the bandwidth of the cards does not matter as long as it's fast enough so that the GPU does not have to wait for data. But that's not a problem in any of the graphics cards, so you might just skip that values (there really is nothing that they tell about the power of GPUs; things like Pixel (Fill) Rate or Texel Rate etc. would tell a lot more).
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