However, the company added that while the controller will work on the PS5, its functionality is only limited to supported PS4 games. So you’re pretty much out of luck if you’re thinking about saving a bit of cash from buying additional DualSense controllers, and utilising your older DS4s instead.
Additionally, the company mentioned that specialty peripherals such as racing wheels and flight sticks, as well as Platinum and Gold PlayStation wireless headsets will remain compatible with the new hardware and games. This also applies to the PlayStation Camera and PS Move controllers for VR gaming on the PS5, but did not mention if the existing PSVR headset is compatible with the new console or not. (Source: Playstation Blog)