Nope, it's just fuzzy math. I mean, he's saying that by 2011 Sony will have sold as many combined pieces of hardware as Nintendo. The stupid thing is, he's including PS3, PS2, and PSP for Sony, whereas he's only including Wii and DS for Nintendo. Look, you can add up anything to be more than anything! Amazing!
I love how when somebody mentions to Sony that the Wii is outselling them by a large margin, they instantly fall back on "the Playstation platform". Like the PS2 is from this generation. That'd be like somebody talking to Nintendo about how the PSP is outselling the DS in Japan, and having their response be something about how "the Nintendo handheld platform (GBA and DS)" is outselling everything.