freebs2 on 22 March 2015
Tomb Raider will not have a grat impact on xbox sales, after all we know it's coming to other platofrms as well (later).
I'd say Zelda and Bloodborne are almost equally important, they won't have a long lasting effect after release, but they're a both killer apps or in other words a they're a reason to own the WiiU or the Ps4. In that view they're both having an effect already on today console sales.
Probably Zelda is more important for the WiiU simply beacuse the console has less killer apps compared to the Ps4.
