VKD3D-Proton 2.11 Enables DXR By Default, Improves Performance in Halo Infinite by 15%

Starfield also gets some small performance gains.
No, You Can’t Upgrade the LCD Steam Deck with an OLED Panel

You can’t upgrade to the 50 Wh battery either.
NVK Reaches Vulkan 1.0 Conformance

“This is the first time any Nouveau driver has gotten the Khronos conformance badge on any API.”
You Can Now Run DirectX 8 Titles Directly through GE-Proton

Plus fixes for Fable III and a few other games.
SteamOS 3.5.5: The Biggest Steam Deck Update of the Year!

Display color adjustments, HDR, VRR, undervolting controls, updated Arch base…
Steam Deck Client Update Adds Visual Tweaks to UI, HDR Badges for Supported Games

Plus easier toggling of Steam Input being on or off.
Steam Deck Client Update Allows You to See Shader Cache Size, Adds Low Latency Option for Streaming

Plus support for the PowerA Switch Nano gamepad.
New PC Gaming Handheld Features Intel Meteor Lake CPU with Arc 5 Graphics

No word on price or availability date.