I would love a new Steam Controller. Basically, just give me the Steam Deck controller separate from the rest of the device.

I didn't love the big track pads of the OG Steam Controller, but I really like having track pads for certain games, so I hope they can find a design that feels and works well. Gyro aiming on the Deck is also really nice, and I love having four back buttons.

The issues with a set-top box is that the Deck SOC doesn't work well at higher resolutions, and you kind of need that for a non-handheld, console-like experience. So they'd need beefier specs to support 1080p on the same titles that the Deck supports at 720p, and many people will want a 4k option as well. So they'd need a new SOC or a dGPU, which would bump the price of the device significantly. They tried that already with Steam Machines, but it just didn't catch on (to be fair, they didn't commit to it very hard).