The only reason wii isnt selling as much as other consoles is it lacks in all its features. i own a wii and my friend owns a 360 and games for wii wont have the same modes as a 360.
example: NBA live 08 only has season mode while for 360 has dynesty, season, FIBA, and more.
For WWE: smackdown vs raw 2008 it only has 5 mach types.
but for the 360 it has 5 mach types PLUS another 10 styles in one type (example:a single mach will have another 10 styles in it like ladder mach, cage mach, money in the back mach, Ect.). while wii doesnt have any of those features. if wii wants to grow they have to have the same (if not more) features as the 360 and PS3. also for wii there is only a Main Event mode and Tournament mode. 360 and PS3 have 24/7 mode, GM mode, Main event, Tournament, and alot more Extra features.
Also online is a big factor. Online is is a thing ppl look for in games...if wii would make more shooting olnine games they should be the biggest console in 2008-2009