Valve Steam Deck Hardware Review and Analysis [video: GamersNexus]
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Then I would not need to look for shmol AMD rembrandt APUs boards with such connectors for a "modular" laptop: 1 clever backpack + 1 displayport panel + 1 battery pack + 1 AMD rembrandt APU board (and its casing) + mouse + keyboard. Ofc, running my custom linux distro with the klugde required by the steam client (bash/dbus/etc) and some games.
As Steve explained in the video, the Steam Deck's input-to-photon latency is lower than the Aya Neo's simply because it has a much more powerful GPU.
The only real way to test if there's any extra input-to-photon latency would be to compare the exact same game on a Steam Deck running SteamOS to a Steam Deck running Windows.