Japan's game industry has been in a bad decline for years now. Their entire PC market is almost nothing but sex games anymore and it is spreading out to consoles and handhelds. Some old game franchises are being rebranded as such even, Valis is now a slide show porn simulator, for instance.
Social and mobile gaming is not a viable long-term publishing plan. Selling $1 games that cannot expand much in concept or method is a poor strategy. $60 games in many cases are not either, but at least there is significant room to change. Making a $4 sequel to a $1 game is rarely going to work out, but bundle in the soundtrack to a retail game and you will rarely see people complaining.
I think one of the biggest problems is that almost every publisher stops caring about their releases two or three weeks after a game is out. What kind of mentality is this? Most of my favorite games of all time I purchased after those initial periods.
I do not think games are going to go away or anything silly like that, the whole system just needs a restructuring. Probably the best example is Valve. They have good ideas, but now people are learning to just wait for almost every game to go on sale there too.