Guys, better keep your imagination and dreams at bay.
No, something really big would`ve been used for marketing purpose - that would not have be decided by the developers, but by the puplisher.
I would rather hope for some nice features like propwash, light reflections of canopies or the like (u can usually spot for many miles before you actually see the plane), meteors at night or something like that.
Even a functioning oxygen device would have been great, but that is already done by DCS...