Dubstep was invented in South London in the late 1990s.
http://www.vice.com/en_uk/read/an-oral-history-of-dubstep-vi...
It was only new recently in the sense that it became a mainstream pop genre.
The article kind of misses the point - pop is a packaging and marketing industry, not a music invention industry.
The invention happens in subcultures, mostly in the UK and US. Then it's discovered, reinvented, and popularised by the industry.
At least, that's how it used to work. With mass exposure to the same online influences everyone is listening to the same stuff and moving in the same directions. There's a lot less original experimentation happening, and that's a much bigger problem for pop than the fact that the industry is making product, because it means there's not much coming down to feed the production line.
I really enjoy finding undiscovered new music on SoundCloud. Amateur production values are incredibly high now - infinitely better than a cassette demo of 20 years ago.
But if anything a lot of the writing sounds professional and safe. It's slick, polished, beautiful/grungy/glitchy/ironic/whatever and good listening. But it's not often amazingly surprising, or fresh enough to kickstart a subculture into orbit.