Nah, Nintendo is not leaving the hardware space.They know very well that what gives their good reputation is the actual games made for consoles, and thus leaving it behind would be a big mistake.I mean, lets say Nintendo went full mobile today.Short term speaking, they would amass a gigantic fortune, there is no doubt about it.But in the long term they would just lose influence and their IPs would suffer for it, since the games they make for mobile would be more of "mini games" rather than full fledged games, they would lose their fanbase and as we all know casuals are fickle.Not only that, Nintendo would eventually lose the reputation of making excellent games and well, one thing will led to another.
As I already said on other posts, the best would be to release a mobile game here and there, once every 6 months in my opinion so that you dont flood the market and make the launch an special ocassion every time it happens, and keep their focus on the dedicated market.That would be for the best.
My (locked) thread about how difficulty should be a decision for the developers, not the gamers.
https://gamrconnect.vgchartz.com/thread.php?id=241866&page=1
