Couldn't you just use any wireless mouse? It's not like the deck is limited to only controllers.

Or is the idea that you want the left controller for movement, rather than using the left controls on the deck or a full controller?

That said, I'm sceptical that the joycon mouse experience is any good on surfaces other than a table. Or even then, considering the ergonomics of the thing when used as a mouse.

Even if the sensor in it is a good one, it's going to be bluetooth, and bluetooth mice have always had painfully noticeable latency in my experience.

You can use any mouse. Also after an initial learning curve, trackball mice are a very couch friendly mouse.

It's cool that the switch 2 has a mouse mode, but it's not very ergonomic and it's pretty limited in terms of comfortable inputs.

Any Bluetooth mouse already works and has better ergonomics.

Buy a wireless mouse with a USB C dongle

Might already be possible with Steam Input...

Just adding here that when I first got into PC gaming, I was really into Battlefield 3 but hated the M+K controls for any of the vehicles so I would pick up my wired gamepad whenever I got into a vehicle.

If we had something that seamlessly mixed the strengths of both input methods, as it seems that the Switch 2 JoyCons do, that would solve so many of the problems I have with playing vehicle-heavy FPS games, or 3rd person action games that also include aiming a ranged weapon.

This has been a thing for the Legion Go since it released. Works perfectly on Bazzite. The legion go even comes with a little disc/stand that you put the right joystick into and hold it like a gun handle.

For those not up to date on things. What’s the gist of that feature?

... You can probably just pair a Joycon 2 with the deck to get the functionality. Since the steamdeck does not feature detachable controllers in its design, an external controller is needed. Any controller that connects via Bluetooth or other wireless standard pretty much works - Bluetooth as a standard even allows a single device to use different profiles.

If the feature for "mouse mode" is implemented in the Joycon 2 hardware, there should be little effort needed to make it work with the deck. If it is a proprietary host/device driver interaction, it probably uses standard HID signals because those would take a good amount of time and money to reinvent, so, reverse engineering everything needed for the driver should be fairly quick and easy for people who deal with Linux device drivers.

Personally, I tend to just use the trackpad on the Dualsense controller as a mouse. It works, no bother.