One can argue it's not really news that a site is reporting old news, but since Gizmodo is read by hundreds of thousands (if not millions) of folks every day, I'm going to give them bonus points and a nod for World Thereminization.
If you're just learning about the theremin for the first time, welcome to Theremin World! To get started, why not check out our What's a Theremin? page, and then head on over to the forums or learn more about buying a theremin.
And if you're hungry for more Matryomin, check out this video of a Matryomin ensemple playing "Song of Mabel" or visit Mandarin Electon, where you can buy Matryomins or even cat costumes for your Etherwave!
Link: Matryomin Theremin Kicks Out Some Weird Jams (Gizmodo.com)