True realism at the right place and time.
Fly out of SeaTac or Chicago O'Hare in most flight sims at sunrise, and you'll get a richly detailed airport, realistic traffic, realistic surrounding terrain, etc. with hopefully jaw-dropping views.
Pick a random airport at a random time with an obscure name or location in the US Midwest, and they all start to look the same (even with detailed, realistic geography): a mostly flat expanse with some hills, and either just the local city lights (if that) or a dull mid-day sun.
To be fair, those checklists are also largely there for so many pilots and those in training whom want to get the experience.