Comment by PaulDavisThe1st

I feel that it's cheating here to include android and ios in this list, since so much stuff that is developed either:

  * is only for those two (and sometimes only one of those) platforms

  * the preferred "version" on those platforms in an app, rather than web-based 

It's clear from the scope of the mobile app market that there's a huge marketplace for a kind of application that essentially never existed on desktops. It seems a little bold to insist that the same x-platform toolkit must service mobile and desktop contexts, when so much is different between them, in particular display size and interaction style. Even more so when the evidence seems to be that not even the web has really managed to do this.