*edit*
Think back to the time when you did not know how to play video games. Yes, that time actually did exist at one point. What were the first games you played, back before you knew how to move in a 3D environment or understood a JRPG stat? The truth is, in the early days of video games most games were fairly basic or easy to comprehend. Me, you, all of us, learned to play video games on much simpler stuff. An SNES game was easier to figure out than the mountain of preconceptions that the Xbox360 and PS3 require you to know before playing a game.
Think hard now...in order to play video games you have to start somewhere. What Nintendo realized was that all these hardcore consoles were excluding beginners. So they made a controller (yes, it's the controller) that was as stupidly simple as the original Atari controller that got so many people hooked, but with a simple hook-up could be made more complex for other games.
http://malstrom.50webs.com/birdman.html
Someone else on the Escapist posted that essay, but it pretty much sums up what I just said. The Wii won because it remembered to make games for beginners, which includes the billions of people who've never played games in their life, the little kids just getting started, and everything in between.
Stop expecting everyone to know how to read Shakespeare without having something easier to learn how to work with before they tackle the hard stuff.