The thing about Uncharted 2, and Halo ODST, and WiiFit Plus (among other games) is that they're sequels. Sequels to games that have debuted on the respective console earlier this generation (Uncharted, Halo 3, and WiiFit respectively).
I really think that the original games had carved out an audience for each console that wasn't there before. In other words, they were system sellers. Now, the audience that these games created are still here. And they're eagerly anticipating each game (See: ODST and WiiFit Plus software sales). But will these games create a brand new audience that will drastically increase hardware sales? I doubt it.








