In some ways i was surprised to find out that transitioning from the 737NG to the A320 was actually a step back in avionic capabilities. Stuff like vertical situation display, navigation performance scales and IAN (no, managed is not the same, FLS would be) are actually quite good. Not to mention of course, that the alert height of the 737NG is 200ft, not only 100ft. Oh, and it does RNP 0.1 out of the box as well as GLS, and of course the screens are bigger on the 737 and their brightness level can be adjusted in a much wider range. As an everyday working place the A320 is better of course, more automation, the table and a slightly lower noise level and more space in the flightdeck keeps one less stressed over a long day.
Would a synthetic vision be nice? Yes, in a way of course it would be. Is it necessary? No, not at all. I'd rather have the distributed breaking action assessment done by the aircraft itself and then redistributed as information to all other aircraft of my company, tangible benefit for real life winter operation, better EFB integration and stuff like that.
Yes, the flight deck in many GA jets sure looks nice. But i always wonder if it is more about "bling" value, and if it can withstand 6000 hours a year of flying, as many airliners manage.