You got it wrong.
PS4 has AMD APIs and the hardware DSP for hardware-level processing, however there hasn't been a single game that is being mixed or developed this way yet. There ware some ramblings about Sony trademarking some names for use with their products (not nessasarily justthe PS4, which many got their pants wet over nothing), this could mean the ability to just enable virtual surround with a flick of an option button.
Then again, the only game that has been released with AMD's TrueAudio is Thief on the PC and that sucked horribly (or is there another now?). So... yeah, whatever. We're still at a state where virtual surround isn't a thing for the vast majority.