So a japanese company dominating everybody and their mother with the PS4 equals the US taking over the gaming industry.... rrrrrrrright!
I like japanese games more, because they tend to have more fresh ideas than generic shooter #244. Creativity doesn't matter too much in the west, it's all about cost efficiency and maximum profit. How do you achieve that? Of course not with entirely new games with new gameplay ideas, nah. Give the people some Halo 5, some Uncharted 4, some Fallout 4 and whatever series you may find that isn't milked to death already, yai! Yearly Assassin's Creed, FIFA, Calladooty, you name it, isn't being a gamer wonderful?
Whatever, I'm sure american developers will fuck it all up sooner or later. Americans are pretty good at fucking up. So look forward to the next crash! I'm sure europe and japan won't be affected too much.
Ok, that was a little harsh. At least we have indie developers nowadays who bring awesome new games that feel fresh and just make a hell lot of fun. Undertale was a blast for example! So Americans can indeed make good games - if there isn't some multi-billion dollar company behind them pushing them like there's no tomorrow.
tl;dr: Japan > Europe > USA