Very interesting: "Tarn sees his work in stridently ethical terms. He calls games like Angry Birds or Bejeweled, which ensnare players in addictive loops of frustration and gratification under the pretense that skill is required to win, 'abusive' -- a common diagnosis among those who get hooked on the games, but a surprising one from a game designer, ostensibly charged with doing the hooking. 'Many popular games tap…
The real reason for tension seems to be this: game designers see Zynga et al achieve the same level of player engagement without careful polish and production values (seemingly).
In other words, it's the age old plight of the artisan who invested time and money into details and craftsmanship, just to see it lose market share to cheaply-produced slop.
In that sense, old juggernauts like EA, who spend many millions in budgets on games, should be concerned too.