When I first plugged in my Wii to my TV I was really amazed by Tennis; It felt so real, so fun, so new... that is until some hours later, I understood the whole infant mechanic behing it. The game only understands two motions ( left & right ) and power due to the accelerometers. Everything else was just the timing, something like a button press. My point is, motion controls need some work to be done in order to compete with graphics as far as realism is involved. On the other hand, some games like MP3 or Sonic SR and SSX Blur actually improve the game play experience due to their merrier implementation ( and that, in turn, due to the game genre/style ). To conclude, IMO it's a matter what game are u playing; if you're playing a FPS or a game that can directly convert analogue control to the Wiimote... Motion > Graphics. Other games, like RPGs, quick-paced action games ( like DMC ) Graphics > Motion.
My themeforest portfolio:
