PS2 sold over 20 Mil, this is pretty disappointing. All the consoles are really disappointing. They in to mobile games or what?
The mobile games were negligible or almost during the PS2 era. The mobile games market in Japan was at 5.1 billions dollars in 2012, and 9.5 billions in 2015. It now has a 25% annual growth rate, and is bigger than the US market even with 3 times less mobile users.
Meanwhile, the console market was at 2.6 billions in 2016 (-7% between 2015 and 2016). It's apparently 3 times smaller than 10 years ago.
So yes, they're pretty much into mobile now.