Hrm, its difficult but personally the amount of personal integration into a game defines how realistic something is to me. For example i dont feel fully immersed by a game with amazing graphics. A game that requires me to act out an action or a command (however primitive it may be) is far more involved than a game that i just sit and tap a button with. But yes, motion controls are still very primitive wheras graphics are reaching their peak, i feel the future of true immersion lies with controls.
Games i'm currently playing: