LOL we definitely have too many "analysts" on this website. Let's paraphrase:
".... should ... should ... should ... "
or not.
First I rather doubt that Wii Fit will be a real smashhit outside Japan. Second Rockband is the smaller brother of Guitar Hero so the impact won't be huge. Third PS3/360 will see GTA in the time, completely destroying everything else. Mario Kart here Mario Kart there. But we will see







