The I think AMD will start the kill off of the $100-$175 discrete cards with Kavari..I think we're at the beginnings of AMD as complete platform vs CPU/GPU manufacturer.
That is a suicidal move since 80+ % of PCs out there have Intel chips in them. Kavari can only cover those boxes that have AMD x86 cores in them. The Intel implementations of x86, it can't.
What they need to do is move more performance down into he $100-175 so there is a value added performance gap between HD4500 and their cards. Which looks like what they plan to do.
The sub $100 range? Now that is questionable. Cost sensitive folks don't want to buy two GPUs.
IMHO that's why they got out of the CPU race with Intel.
They got out of the race of trying to match everything that Intel is doing. It remains to be seen if they are going to do well competing iGPU vs. iGPU with Intel with the transistor budget skew they have overly weighted on GPU.
Intel is closing the gap relatively rapidly without having to sacrifice much on the x86 core side. AMD relatively slow pace to 28nm is going to bite them in the butt if Intel's Haswell transition goes smoothly.
HD5200 should arrive roughtly the same time as Kavari
http://www.cpu-world.com/news_2013/2013012702_Haswell_GT3_graphics_to_launch_in_Q3_2013.html
It looks like Intel may be packaging dedicated RAM into the package with HD5200 variants. I don't think it will be faster but it will be less risky for most system vendors.
I'm sure AMD will make some money when PS4 and XBox720 launch.... just not sure if more mainstream PC market is going to buy that style of architecture.