Regarding the graphics, I do not really see a problem. I do not see the interest in this kind of race to high definition which is desperate to have a realistic game. And in addition, it allowed me to avoid changing my TV (nearly new) to play as it is not HD.
However it is unfortunate that only few games actually use the wiimote and Wii still lacks a lot of good games, especially good RPG. So concluerais saying that the main objective of this console is the fun with games like Mario Kart, Smash Bros., Rayman Raving Rabbits Wii Sports or simply (but the life of Wii Sports is limited).