Also, if we came up with the technology to transfer matter to energy, and back to matter again, we could travel light speed, affecting the time we are aging. 1 hour traveling at that light speed and all of the people we know when we come back would all be years older than us, even though we only aged an hour.

come to think of it, if we could transfer energy to matter we could digitize software creations and make them real, like virtual porn you can sense with the 5 senses.