Does the brightly lit centre display of the x-wing cockpit have any meaningful use to the pilot?
According to Star Wars: Blueprints - Rebel Edition, this is the "Primary Display Monitor".
The text below this panel reads;
The Primary Display Monitor is a multi-function instrument that can be pre-programmed for optimised readouts, streamlining standard flight information with data related to tactical conditions, reconnaissance and communications.
It's the armament, the targeting computer, it's just on a sleep mode of sorts.