This is flame bait at its finest. Metal Gear Solid 4 sold to 1/4th of the ENTIRE console base in Japan. You can gloat till your blue in the face, but there is really nothing that astounding about its drop-off. The game is sold on a console that is 150% more expensive than its #1 competitor.
The game will have legs as soon as more hardware is pushed / moved. Not everyone out there buys a game when it is first released. If Final Fantasy XIII comes out this year, I predict this game will sell 4 million worldwide. With Japan going into the 750k sell range.
These dramatic and flamboyant comments from fanboys are irritating. Metal Gear Solid is NOT a game for the casual audience. It is not a Smash Brothers, it is not a Wii Fit, it is not a Halo. The closest thing to compare it to is Gears of War.
Console Agnostic since 2001.