One must not underestimate ambiance things. Simulator is all about the feeling of "being there". Approaching a planet after billion miles and having somes pics and the ships's system that (seem to) aknowledge your trip is very rewarding.
Also it's a win/win trade : great add for a very low coding time (took me 4 hours). Somes others systems in contrary could take weeks to do for a medium or even poor gaming result.
For example a complete power managment often just resume in "press a-b-c-watch gauge-go", 5mn in simulation but a hell of coding if you want it realistic. (Must really power systems by various circuits)
I'll open a new thread for screen right now.
Dan