I talked with my dad and realized that without fire we couldn't do any welding or soldering. Which is going to be important in the future (soldering for computer parts and welding for pretty much everything made of metal)
Eh: I kinda touched on that but I'm not going into it much because we wouldn't have advanced to where we are now without thousands of other inventions as well (wheel,electricity,math,etc.) So I'm just showing relations between how fire makes it better (internal combustion is better than horse drawn carriage, burning stuff makes electricity)
Tom McCurdy: I though about it, but to my knowledge there's not a single bunsen burner in my school. They use hot plates so the flames won't ignite the chemicals.
dave_gilmour: Yeah, but in the future I really can't see us burning fossil fuels for electricity. I used it for current uses of fire though :)
Other than soldering and welding I can't think of many practical uses for fire in the future (way way future, I got to prove fire is the BEST discovery ever and that it will always be the best)