Where did non-commercial come from? You think artistic portraiture was non-commercial? Heyy.. what's going on in this drawing by Bruegel http://www.ibiblio.org/wm/paint/auth/bruegel/buyer.jpg ???
I found it hard to agree or disagree with you, because I couldn't imagine how images would be a more convenient than text to communicate. I would have loved more detail around the new use cases you see being part of this 3rd wave.
The first non-commercial uses of photography were for experimentation and artistic portraiture. I don't understand why you disagree with me.
I'm not saying there's no future for artistic photography; I'm saying that there are new use cases that haven't yet been fully developed.