How close are we to truly photorealistic, real-time games? Who cares? Does anyone really want that? Players don't come back again and again to games like WoW

How close are we to truly photorealistic, real-time games? Who cares? Does anyone really want that? Players don't come back again and again to games like WoW or Farmville because of the graphics. There's an argument to be made that obsession with higher and higher degrees of pixel-slinging has crippled the triple-A games market, leaving real invention and creativity (and ironically enough, the truly staggering hits, in terms of P/E) to the indie scene.