Absolutely, this fall leather pants will be back! Although, be carefull not to overdo.... so no leather jacket with a pair of leather pants unless you are a biker. On the other hand, if you're going to wear leather pants, wear some type of leather shoes, preferably boots of a similar color (black with black, brown with brown, etc.) Leather pants with sneakers just looks bad.
Leather chaps can give you with a lot more safety from road rash than a pair of jeans can. Since leather chaps are wear over your pants, they make more sense then just wearing leather pants since leather pants can be hot and you can easily take the chaps off if you decide to stop for dinner while out riding.