Bollocks. It's a chip going in Macbooks and such. You won't be able to get it anywhere else. It's an OS X product, not a Win10 product. AMD's APUs aren't even supported in that ecosystem. I doubt that you'll see these chips running Win10 (though you might seem some with hacked Linux installs). No consumer or OEM will look at "wintel" APUs as "low cost alternatives" compared to the Mac products featuring these Intel/AMD hybrid chips. They are not alternatives at all, since you can't really do the same thing with them.
If this was a product just for Apple - woudn't it be Apple making the announcement, not the Intel/AMD? To me, this looks like a direct successor (and upgrade) of Intel's high power products with Iris graphics, and sold to everyone. Also, Intel said they will be managing the drivers provided to them by AMD- which would not be needed if this was used just by Apple.