If we knew, we wouldn't have to look.
Dave and the Martian - d'you think science is all about picking a selected improvement to technology and then researching the topic to build the gizmo? Hardly. The whole point of science, in all its fields, branches and offshoots, is to try to find out how the universe works. Frequently, that knowledge becomes useful. Not always, and not always immediately, but frequently and eventually. Historically, pure science has always paid off in the long run - but the order of things is normally "find out what's happening, THEN find a use for it".
We don't know what this research may lead us to. We can guess at possibilities - a better understanding of gravity, mass, and energy could lead to fusion power, anti-gravity, better energy transmission - or it could lead to something totally unexpected. It might even lead to nothing - but you have to buy the ticket to get a chance to win the prize.