… In the meantime, you can have a play with the CAD files Valve released for the Steam Controller and its puck to support community accessory creation - or read our full Steam Controller review . source store.steampowered.com
… This is ideal for general OS navigation and non‑game tasks, but it does mean that titles must be launched through Steam - either natively or as non‑Steam shortcuts - to exploit Steam Input's remapping and advanced feature support. …
… We've been working on Steam Input support with Sony, for example, to make sure PlayStation controllers are supported on PC. I guess I see Steam Controller as less of an upgrade from a normal controller, and more something that opens up new possibilities. …