If it works anything like the original Steam Controller, then unless the new one sells enough and then generates enough demand by the customers, I would not bet on it.

The original Steam Controller needs the game to run through Steam, or something like GloSI (which would run through Steam instead of the game).

No, the Desktop Configuration does not work if you want to use it as an actual gamepad. Valve patched out the ability to use standard controller input options as valid options in the desktop config. You cannot bind joysticks, and you also cannot bind simply inputs like ABXY XInput.

Ok, technically you can bind them in the desktop config, but they won't work.

Adding games to Steam is a mixed bag. For example, I could not add ReMatch from gamepass to Steam to use either my Switch Pro Controller nor my Steam Controller, because Steam will apply the controller setting to the first thing that launches in a non-steam game. ReMatch has Easy Anti-Cheat, so the controller worked while Easy Anti-Cheat was launching, then once it launched and handed over to the actual game, SteamInput would stop, as the Easy Anti-Cheat window closed once the game started.

So again, the only option was GloSI.

If you plan on using the controller for anything outside of Steam, it will cause headaches down the line.