Slick controls, deep-yet-simple gameplay, and consistent entertainment... These are easy enough concepts to grasp. What many third parties are not grasping, however, is the primary lure of the Wii: newness. Most of the core gamers who invest in the Wii are digging for the feel of something new, and of course all of the expanded audience wants to keep getting pleasantly surprised.
So no, games that ape on existing games don't do so great on the Wii. They're nothing we haven't seen a dozen times before, after all. Even if the developers make the most immersive controls ever, the most addictive gameplay imaginable, and an experience that never stops being fun, it's all for naught if it's just a rehash of what's been done before.
Even Nintendo is having trouble with fully grasping the nature of the beast they've unleashed. Surefire hits have fallen short of expectations, and unexpected "evergreen" hits have emerged where nobody was expecting that kind of success. It's not easy to grasp the expanded audience's tastes.
Sky Render - Sanity is for the weak.
