Some details on peripheral backward compatibility:
https://blog.playstation.com/2020/08/03 ... cessories/
Dual-Shock 4s will work for backward-compatible PS4 games, but not for PS5 games.
Move controllers and the Aim controller will work with VR games, the camera will require an adapter, which will be provided for free somehow. The VR headset itself isn't actually mentioned.
People seem to be outraged about the DS4 not being compatible with PS5 games, but after thinking about it, I think it makes some sense. First off, since when do we expect full backward compatibility from controllers anyway? As far as I'm aware, this is a first for non-Nintendo consoles, and those largely had similar restrictions. More importantly, it allows developers to take full advantage of the new features on the dual-sense in game mechanics without having to worry that players will miss out.
The camera adapter thing also raises some interesting questions, since there's no reason to change the camera port unless their planning a new camera model in the relatively near future. Also, props to Sony for giving the adapters away for free.