Valve has announced official Steam support for Nintendo's Switch Pro Controller, which you can tinker around with right now, provided that you opt in to the latest Steam beta.
"We think it is a great device with a feature set that pairs nicely with your Steam catalog," says Valve in its latest blog post, "The d-pad is ideal for fighting games and platformers and the gyro enhances aim in your action/FPS titles."
There's certainly a lot to like about the pleasingly chunky, supremely comfortable Pro Controller (although its lack of analogue triggers might be an occasional issue); however, its big strength is its excellent gyroscope, which should work a treat for precision aiming in shooters and the like - making for a welcome alternative to the similarly featured PS4 DualShock or Steam Controller.
It's actually been possible to use a Switch Pro Controller on PC for some time now, thanks to its Bluetooth support, but it was a bit of a faff and required a third-party programme to function efficiently. With Steam support now built right in, things should be considerably smoother.
If you want to give it a go, full instructions on how to set up a Switch Pro Controller via Steam's latest beta release can be found in Valve's latest blog post.