Or put another way, the graphics of Infinity Blade III are amazing, but the gameplay is quite dull. Compare that to any top tier PS2 game and I don't see why you'd ever pick what's available on the iPad to play for longer than 10 minutes. And the GPU performance on the iPad Air is several orders of magnitude better
Personal preference.
I've spent many, many times more hours playing games on my iPhone/iPad than I ever did on console games. Not because I necessarily prefer them, but because of my lifestyle and the time I spend travelling or away from home for whatever reason.