Yes, ethanol fuel cells are the way to go if they can be made to work with say, 96% EtoH or with anhydrous ethanol. The real trick will be building the biomass conversion plants, and incorporating fungal digestion of cellulose (to release sugars for fermentation). Large-scale ethanol production will, however, require government tax supports (as is the case with fossil fuels today).

The science fiction (at this point) dream is the photoelectrochemical hydrogen fuel cell - a model of what plants do, splitting water using light energy and creating hydrogen and oxygen (See Michael Gretzel). The hydrogen and oxygen streams are then 'burned' in the fuel cell. Nevertheless, you still want to have a tank of fuel around, and that means ethanol or biodiesel (see Joshua Tickell).