Heavenly Sword

Why are games like Heavenly Sword missing on XBox 360? As much as I enjoy XBox Live and many of XBox 360's other features, I am getting very irritated from the abundance of first person shooters and the lack of RPG and action titles. The launch of PS3 was flawed from the beginning, but it seems that Sony might just recover as it releases more games like Heavenly Sword and other non-shooters. I usually wait 12 - 18 months before considering buying a console after its initial release. When PS3 turns a year old next spring, I might have to trade in may first person shooter console for a system that actually plays a variety of games.