Japan is a small market for GTA. It can sell all of it on launch day at the fastest rate ever and it will still count very little towards the lifetime million level sales for a GTA game.
At the moment, for multiplatform multiplayer games, Xbox 360 takes the cake by a mile. So when a consumer chooses which version, the average HD consumer is choosing the 360 version, because ratios are above the HW 1.6:1, and this translates to millions in total sales. You have remember that Xbox Live members already have an established group of friends in their communities and gamer identities with achievements, and this momentum is carried forward.
For the PSN to do well, it has to look towards its future games and improving on its communication tools and focusing on multiplayer. Haze may be the first to actually take it seriously, so we will see how well that does. At the moment, the marketing is heavily towards being a media player, so its not in their top priority.







