It never ceases to amaze me how different the Japanese market is compared to the USA & Europe.
The vast majority of gamers became handheld dominant players in the span of a single console generation. That was freaking epic. I've never seen the videogame market anywhere do that. Sure there's changes in market leaders, but we've never actually seen a market change like this, and neither has the development community.
Which is why we're seeing so many Japanese companies shift focus away from the Japanese market.