Washington State University physicists have created a fluid with negative mass, which is exactly what it sounds like. Push it, and unlike every physical object in the world we know, it doesn't accelerate in the direction it was pushed. It accelerates backwards. https://www.sciencedaily.com/releases/2017/04/170417095534.htm
Whoop-dee-doo! Negative mass has been detected on an atomic scale at near absolute zero. What good is it going to do me?
I'm sure in 1873 when the "A Treatise on Electricity and Magnetism" was published people just like you said the same thing. We haven't found a real use for electricity until the edison bulb 6 years later. Heck, how long has the wheel been around before we found each and every use for it based on how it works?
Okay then let's get to work adapting the science of negative mass to solve the country's obesity problem.
Actually i know of a company that is working on proper hover boards. these use magnetism for going forward and staying off the ground, of course. with negative mass, we would have to produce negative magnetism, something that others claim is as yet not understood. so, let me try, again? Magnetism is the strong force, as, the electron is the weak force - electricity - and the connection between electromagnetism and the electron shows that the counter particle the proton is obviously the way of magnetism, yes? this means there is no graviton, as then there would be a particle giving something mass that already has mass, yes? So, for us to use reverse mass, would be to make things lighter. uses i can think of are for transporting things and so forth, where we could, for example, transport gold and such in a container that pushes out negative mass, where it will bounce on the ship or something, of course. Getting this negative mass to be a container might, even though i have not read the article, be accomplished by magnetically charging the thing that would propel it in one direction not in that direction, but a 'spark' or 'joining thing a ma bob' from the point of force back towards the point of force pushing it. this would mean we could 'pull' containers onto the ships or planes, and, then if enough of this - wait is this stuff expensive? - onto the container, it would weigh less, yes? wait, that doesn't make sense any more, except that the... hell what can you use this stuff for?