Street Fighter IV. What happened?

[alfredofroylan]

Capcom shipped 2 million units.

http://www.videogamer.com/news/street_fighter_iv_ships_2_million_units.html?

But what's happening with the sales?

XBOX360

http://www.vgchartz.com/games/game.php?id=16065

PS3

http://www.vgchartz.com/games/game.php?id=13112

America seems like the most active territorie for the game but still I think it's far from Capcom's expectations. Are new generations uninterested on 2D fighters?