It's always fun to read about, but their research isn't that groundbreaking. It's been going on for years (C'Mon, Nintendo Brain Age did the same thing), which shows conclusive proof that designing a game or test around certain tasks vastly improves relevant brain functions when trained daily. A university test turned one normal college student (with completely un-extraordinary mental abilities) into someone who can flawlessly memorize a string of 84 (single and double digit) numbers after only seeing them once. The important thing for that was also that his memory improved across the board, not just with number. He kept coming back and improving because it made his college studies easier as time went on.
Plasticity research is amazing, and I'm interested in checking out their game, but what they are doing is simple evolution in Neuroplasticity and not revolution like this article makes it out to be. Not that I'm knocking the writer, I'm not, I don't want anyone to get the wrong idea.