Too many sources of information in the cockpit could stop the pilot doing what he is paid for Nick - flying the aircraft.
Ideally we would all like a super-duper, head up display or helmet mounted display with all the aircraft symbology superimposed on a composite TV/FLIR/NVG image but the pilot still has to fly the aircraft with reference to flight instruments however they are presented - it is usually a failure to do this properly that results in CFIT.