If you think all three consoles are in trouble, I guess my question would be "where are gamers going?" I don't think it's Steam, because PC gaming is still a fairly niche thing, and I don't think it's mobile games, because mobile games are largely garbage (or at least simple). I just don't see a world in which gaming devolves into ephemeral free-to-play App Store crap. I have an affinity for Nintendo and Sony, but more than that, I have an affinity for serious games that respect me as a player.
I agree that mobile games won’t completely control the market (though will be the much larger ecosystem). I think “hardcore” gaming will evolve as well. I wouldn’t bet against this.