I think AMD's endgame is at the 2nd half of 2016 when we see all their plans come full circle.
They're laying out a lot of ground work for 2016. Current APU's are severely bandwidth limited, which will be remedied with HBM. The HSA foundation should have covered some ground. Along with that Zen will finally be unveiled. The long toothed 28nm process node will be a long forgotten. Vulkan/DX12 should be highly utilized, minimizing Driver overhead and increasing multi-core processes. There will be a lot more FreeSync monitors out that have better qualities and refresh ranges.
Lots of IFs but that all we can do is wait and see and keep pushing AMD to improve their software and marketing. Not that I've ever had problems with them. But if I too jump on the bandwagon... I had tons of issues with my GTX480s that ran incredibly hot, loud, SLI rarely worked and drivers kept crashing. So nVidia software must be garbage, nothing can change in 5 years right?
The 300 series of cards will be a stop gap but also a proving ground for HBM, another technology AMD developed that will be used throughout the industry, including nVidia for pascal in 2016.