But seriously, what about the chances we are looking at a last minute change on behalf of the gooseneck viewers?
As an intercom device the TV set in Pike's cabin must have looked lame ("So they have TV aboard their starship, great") compared to these 007-type miniature viewers.
And somehow that idea must have stuck with them (miniature screens are more futuristic). The briefing room in "The Corbomite Maneuver" had a wall mounted flat screen
, but instead they looked at the triangular viewscreen on the room's table.