While this is impressive, and the kid has every right to be proud, he's not the super world changing genius that the article is trying to paint him as. And an IQ of 175 doesn't immediately mean he'll uncover some profound theory and change the world of science. At the age of 12, an IQ of 175 would mean he has the mental age of a 21 year old.
Also, working on an expanded theory of relativity doesn't mean he'll actually achieve anything from it. That would have to remain to be seen.
All said, still impressive. But not a superpowered brain mutant.