Pontius: I agree with you on this. An analogue dial had to be used to fly a number. You had to interrogate the instrument to confirm what it was telling you and decide if it was what you wanted. The glass tape display cockpit is a picture. Is the a/c performance bug lined up with the command bug. The number doesn't matter. The error can be seen and corrected with intuitive reaction; if taught how correctly at the beginning. A scan is now much faster than before and more relaxed. The trouble comes with the F.D. tunnel vision pilots. No scan.
On the speed tape the added picture of the manoeuvre margin and stall margin bands adds a greater sense of comfort that a raws dial. Critical information gleaned at a glance. Excellent.