In a nutshell, he's betting the farm on fringe benefits that most gamers don't know or care about; sticking to the tired "fad" and "soccer moms and kids" meme for the Wii; and believes that Sony domination starts in 2008. He's also projecting that the Wii will see the same steep decline that was supposed to doom the DS. After all, there's no way a technologically inferior console like the Wii, DS, PS2, or NES can maintain longevity. Graphics, baby.
Basically he holds the same opinions as every other idiot you can find online, except that he can use proper grammar and spelling.