At those prices, I'm not sure whether they're anymore viable than the proc's built in IGP. Sure, they will be better but by how much? There must be a market for them otherwise why would the two companies bother with them at all.
A GT1030 or 550 will be anywhere from 2-3x faster. More importantly, they both have far superior drivers compared to intel's garbage.
AMD's APUs are not really in the running because, while they have the same size GPU (512 shaders, 8 ROPS) it is not only an older arch on 28nm, but it is hamstrung hard by bristol ridge's abysmal CPU and memory controller performance, which chokes the GPU before it gets off the ground.
Now, when raven ridge comes out with a full proper memory controller and proper CPU cores, then GPUs like this will be mostly obsolete. But this is AMD, so dont count on it anytime soon.