The transporter would quickly become a matter replicator, since - like a multi-function printer/scanner - you can take a pattern and, with suitable energy sources, repeat the pattern as often as needed without the need for a rescan. Which would begin to eradicate world hunger. That would also be the key to terraforming since you could tune your transporter to only take, say, Sulfur Dioxide out of some volume of air. If anyone could solve the engineering issues there, you would have something so incredibly important that a Nobel Prize would be inadequate.