There are two distinct sides to this issue, and it appears that there is not sufficient evidence for either side to conclude that it is either real or fake.
On one side, you have the fact of the carbon dating. Despite the fact that carbon dating is not infallible, a date is given. Another fact is that an artist has replicated such a thing nearly exactly using a charcoal method, even being able to produce microscopic depth to the picture. Another fact is that in John's gospel, he records there being a separate cloth for Christ's head and for His body, if you believe that John is reliable.
On the other side, you have the fact that the monastary fire the shroud was involved in could very easily have affected its carbon content, throwing off the dating. Also, the pollen found on the shroud is traceable back to a plant only found in the Holy Land area near where Jesus was buried. It would be an extreme situation for a fanatic to plan out such a thing to that extent if it were a forgery.
So in the end, i'm forced to sit on the fence. Though for some the shroud being proven to be real would probably help their belief, but I don't find such a thing necessary.