As far as looks are concerned an IGH road bike can have much of the simple appearance of a SS/FG bike but still provide a range of gears. I have a SRAM 5 speed hub on my old Duracycle originallly FG bike and a Shimano Alfine hub on my recently completed Steelwool Tweed. At a casual glance both look like single speeds except for the single shifter and the cable to the rear hub. Both are drop bar road geometry 700C wheel bikes.

To me either one is more versatile than a single speed or fixed gear bike for day to day use but I admit to being a geared hub fan as I have bikes with everything from an old Sachs torpedo 3 speed hub cruiser to a Rohloff hub bike.