Eventually devices like the Astro may not be needed at all. Since the PS4 has AMD TrueAudio and can stream audio into the controller, then it too could eventually get wireless sound without the need of an external DSP unless you specifically want different processing.
I can only hope PS4 releases a device that's similar. I'm thinking if Microsoft's adapter sells well, Sony will follow in their footsteps. I wonder if it will be as good if not better at surround sound/positioning than what Astro has put out.