Originally posted by Pentaxor inspite of it being a fixed lens, I don't seem to mind as a back-up specialty walk-around camera that can do what a dslr camera could with certain occasions.
Regarding the X100 having a fixed lens - while it certainly reduces its flexibility there is one distinct advantage --
There won't be a compulsion to bring extra lenses, change lenses, or buy lenses/adapters. You know if this was an interchangeable lens camera eventually you'd fall into that trap. So you are always ensured of its relative pocketability.
I liken the X100 to the Leica X1 but with better performance I expect. I've always wanted the X1 as a walk-around camera but feel the price is too much ($2k), especially since AF is reported as quirky and somewhat slow.