I was thinking it would be really great if Lotus offers a system that would put fallen leaves on streets (and surrounding areas) in the autumn (I don't ask for an animation of falling).
I'm aware that a single mesh for each leaf would cause a performance chaos, but maybe it could be a big grid and a texture does the job.
This functionality could be used for trash as well - newspapers, flyers... (sadly, some cities aren't very clean so... reality).