Indeed: position and anti-collision lights on planes would be very helpful in identifying traffic (I disable all extra information as I try to have a as-real-as-it-gets experience). Almost ran into a stray C172 while flying to Prague.
And is it just me or do large radio antennas and wind turbines lack anti-collision lights? Being a non-GPS VFR pilot this would help me in my adventures quite a lot.
Looking from my living room window onto three radio towers I see bright red lights seemingly missing on their virtual representation in Aerofly FS 4.