Bingowings said:

I hate to say this but do we actually need a tiny hologram of Vader in the AT-AT cockpit?

Wouldn't it make more sense to have a small monitor showing a conventional 2d image of Vader?

Vader has the same set up in his chamber and it would remove the eye line problem.

For conference calls and personal messages holographs seem to make sense but this is the cramped interior of a moving military vehicle.

Toning the tech back would make more sense.

I always assumed long distance communication required holograms on the Executor, but communication within the ship used monitors.