TCK, I must say I do like your "Death Note" Signature.
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I absolutely love my Wii. I think that Nintendo limited it's graphics capabilities on purpose so that developers would try to focus more on how their games play. There are some AWESOME games out there on the Wii that don't compare to any of the games on the xbox360 or ps3 (I own and play all 3). Now, I'm not saying the other systems are horrible. I love them in their own respect (Though PS3 Needs to get some A quality games on it. The best games I've tried on that are Enchanted Arms and Virtua Fighter 5... both I'd rate a "B" quality game). Miyamoto has always focused on gameplay, and it is a tradition that has been held with Nintendo. Now, on the other hand, the graphics really don't suck on Wii. It could be improved a bit, but they really aren't horrible. I would put most of that blame on the lazy developers out there right now. But oh well.
My Personal Predictions:
Wii - Will continue to do great. Game stores around here are still having problems keeping them in stock. People love the style of play and find it very intriguing. Whether it will continue to do well will be based on if they can keep putting out innovative enough games to counteract it's flashy opposition.
PS3 - Will bomb until FFXIII comes out... then it will float up the charts. Then, like a balloon, will slowly deflate until it drops. Blu-Ray Will keep it up a little as well.
XBox360 - Will stay doing "good" but not great. Halo 3 will give it a boost (I have mine reserved) but come on, you don't release a system that is practically expected to have problems with it.