hmmm
counter argument
if Nintendo creates a market that exist for them, then they have a market that they can almost always depend on
if Nintendo spends their time chasing what's popular they risk missing in that area with no core to fall back which could lead to bigger problems
if the wii's job was to get people interested in Nintendo games then that was a smart strategy on their part imo
the casual market is fickle, easily swayed by passing fads with those fads being next to impossible to predict or see coming like catching lightning in a bottle
put simply:
consumer saying they want to play the next Mario game, is very different from consumer saying they want to play the next fun game
the next fun game could come from anyone and more importantly anywhere as such that consumers sale could go to anyone and anywhere, the next Mario game however, is only ever going to come from one place to which that sale is going to go to
