Well,the new info we were given about the PS4 SOC:
1.)Has a dedicated audio unit
2.)Additional hardware for zlib decompression.
3.)An additional system chip which can be used for background purposes,enabling the main CPU and GPU to be shut down.
4.)An additional bus for the GPU,which bypass its caches.
5.)Modified GPU L2 cache,which is better optimised for mixed compute and gaming workloads.
6.)The GPU is not straight GCN,and might be GCN2.0 and seem to be more compute enhanced. It might give us an idea of what to expect for the HD8000/HD9000 series.
This beyond what we know for Jaguar,which is not meant to be fully HSA enabled at the hardware level. The GPU also seems to have various features which enhances its compute ability.
The additional system chip is interesting.It could be a single Jaguar core,but I suspect it might be an ARM based core. If it is the latter it would make the CPU section a hybrid X86 and ARM based design.
It is Kaveri which is meant to be the first part AMD has mentioned which is actually fully HSA enabled at the hardware level. If anything if the PS4 SOC is confirmed as the first proper HSA enabled part,it is more complex than what was thought originally. It was never mentioned before that the PS4 was a HSA enabled part.