Browsing Google Patents, I stumbled across some interesting Boeing patent applications e.g. this one 6 years ago:
PRIMARY FLIGHT DISPLAY PITCH AND POWER-BASED UNRELIABLE AIRSPEED SYMBOLOGY. (Download full PDF
here in order to view Figs a little better ...).
In this one I was struck by their "Background" para [0013] which reads:
QUOTE
The displayed symbology is not static and updates as the airplane weight, altitude, flap setting and thrust change. As a result, critical information is communicated in a format that is intuitive and in a form that the pilot needs, and is expediently usable by the pilot to maintain safe, stable flight conditions as a result of air data failures throughout the duration of the flight. This symbology is independent of the angle of attack (AOA) or the air data system.
UNQUOTE{my bold}
Is any of what's described yet designed into any production PFD?