For starters, no, DualShock 4 cannot be used with PlayStation 5 games, but PS4 controller will do for backward compatibility. Along with this, steering wheels, sticks for fighting games and joysticks will work on the PS5.
Various revisions of Sony wireless headphones (Platinum and Gold), as well as third-party devices with a USB or audio jack connection, will work seamlessly on the new console.
PlayStation Camera, PS Move and PlayStation VR Aim Controller will be supported on PS5 for PlayStation VR games. However, you will need an adapter for the camera – it will be given free to owners of PlayStation VR headsets.
PlayStation 5 comes out at the end of the year, and by the end of August, Sony is rumored to have a big show not only with fresh announcements, but also the exact release date and price of the console.