I see this gen more at that western developers are taking the space that belongs to them. Before this gen it was pretty amazing how Japanese dominated the whole console industry when you consider that there are some differences between tastes of Japanese and western consumers. This gen with consoles becoming enough powerfull and more PC like western devs that used to make games only for PC have sarted to make games also for consoles. Pretty many of this gen big ips have PC origins or are from long lasting PC dev (Call of duty, Elder's Scroll, Fallout, Mass Effect etc.). Japanese games are selling just fine when you count handhelds. It's just that sales of western games have exploded in the meantime. As for quality with handhelds included I really don't see that big drop with Japanese games. Maybe small drop and even that has come from the fact that Japanese devs have tried to make more western like games and failed. Regarding the quality of western games it's just that mainstream audience can now enjoy the games that PC gamers have enjoyed forever. Quality has always been there.
