a technology is new as cellulosic ethanol is, the first attempts at commercialization usually do not meet the entire demands of society with the first effort. For example, when the Wright brothers thought of trying to build a flying machine they didn't start out trying to build a Boeing 707. Most people at the time were rather impressed they were able to get in the air at all. I suppose there were people around then who thought: "Well sheeeit! Only a couple of hundred feet. This flying machine idea isn't worth bothering with. I have to be able to go several miles to get to town! Hell, my horse is quicker too and i don't need all those helpers to get her going either."
Actually, considering that nobody has been able to produce cellulosic ethanol as a commercially viable enterprise yet, this outfit is pretty confident going from a 40,000 gal pilot plant to a 100 million gallon plant in about one year.
But you raise a very important point, which I have tried to make people more aware of and that is it takes a good amount of time to build up volumes of production to make a dent in our demand for gasoline. that's why we will need a starch based supply of ethanol for a number of years till cellulosic can be built up (assuming of course someone succeeds in making cellulosic cheaply enough to be profitable - I think this will be accomplished.). But be advised they won't turn out half (or even 1 percent of) the nations demand for fuel with their first plant. It will take a little longer than that.
Even when plug-in hybrids start becoming available and even with significant improvements in mpg it will be years
(and billions of dollars) before plug-ins will save just 4% of the total fuel demand (the amount of gas ethanol replaces now). THese things do take time after they have been shown to work and even once they are shown to be commercially viable it still takes years before much of a dent can be made in our total demand for gasoline/oil.