One thing I hadn't really realised until last week was that the Steam Deck's Thumbsticks are touch sensitive. It knows of you have your finger on them or not.
Why would you need this? Valve updated Half-Life 2 specifically for the Steam Deck to showcase it's controls. Mad if you consider the game is now 18 years old, but runs beautifully on the Steam Deck and looks amazing. The graphics have dated very well.
Anyway, in HL2 you use the standard controller layout for FPS with the left stick moving you around, and the right stick moving your view to look directly at anything. But if you have you finger rested on the right thumbstick without moving it, it activates the gyroscopics so you can move the Steam Deck adding to move b your pov in the game. Let go of the stick and move thr Deck stops moving in game.
Bring able to physically move the Deck to control your view in game works really well for FPS. I played through the first part of HL2 yesterday until I get to the helicopter bit. Moving adding using the thumbsticks works really nicely, but when you are shooting, bring able to fine tune you aim by physically moving the Deck makes aiming and shooting very accurate. I get a lot of headsets. And it makes it far less frustrating and fun. And I was playing on Medium and no autoaim so it wasn't compensating.
Another nice feature of the Steam Deck.
Now Valve need to make a Steam Controller 2 using the controls and software from the Steam Deck. Combining the controls and all the features into a standalone controller would be brilliant for full PC gaming. The Steam Deck controls and configuration are a huge leap forward from the frankly odd original Steam controller. That has good ideas but was never intuitive. They leary from that and have got this spot on.