The combination of primarily Gamecube and PS2 ports on the Wii means that its graphics are already far below the PS3 or XBox 360s graphics and yet it outsells both systems combined ... In 18 months when the Wii really starts to hit its stride with a massive quanitity of high quality third party games it is suddenly going to seem gimicky and old compared to the PS3 and XBox 360 and stop selling?
What people never seem to understand is that third party support is linked directly to sales (not processing power); by the time the PS3 and XBox 360 hit a price where customers will consider their platform the Wii will have captured such a dominant marketshare that third parties will be focusing all their efforts on the Wii. The higher processing power and lack of Wiimote controlls will act as a negative for the PS3 and XBox 360 because developers will doubt the can produce worthwhile ports for a reasonable price (after all they would have to dramatically improve the graphics), reconsider the entire control scheme, all for a tiny portion of the market.
