@auds78 - Sorry - I said this all wrong (me + little sleep = very unclear explanations =D). The SUGAR maples, which provide the syrup & most of the color won't survive a significant climate change around here. Of the other maples, & there are a large variety, some survive the change & other varieties will opportunistically move into the voids left by the sugar maples --- so it isn't maples per se that will die out; it is specifically the sugar maples (& the ones around here have been really stressed by the last few years of too little rain & too much rain, poor things). Does this make more sense?
I don't think the trees will die, there were maples where i grew up. I just don't think the sap gets sweet enough to become syrup and the color of the leaves is due to the amount of precipitation that trees get in the summer. Tourist will still come, they just won't be able to take home some maple syrup with them.