The advantage of the fuel cells is that they are far more efficient than other generation methods (steam or gas turbine). If the fuel cells are of the solid-oxide type, a steam-turbine "bottoming" cycle can increase the efficiency even more. So there is a legitimate advantage to generating power this way.
The bottom line is also this: What is the cost in dollars as well as the toxic input to create this more efficient energy?
So far, all the so-called 'green energy' producers are not so 'green' at the front of their construction. And, nobody is thinking or speaking about that. I read articles where those companies are failing at a fairly rapid rate because without subsidies the energy they produce costs well above the market-price.