Oh come on, no-one wanders into GAME and goes "oh whats that thing? Vita? Sure, i'll try one, bag it up."
Everyone in that launch week went to GAME out of convenience, staying in waiting for a parcel is tiresome or impossible for some, and they're in every city centre where a lot of people work.
If it wasn't, they would have went elsewhere, ALL of them.
As to what will happen in the future, i still say that no-one buys expensive hardware from a random wander into GAME. If someone wants something, they'll get it.