Some of you guys are missing the point these games are for the casuals. period. wll they be quality???? probably not. but most of those Wii games arent either. Im a Sony fan but I give props to MS for being so ballsy with their Kinect. there not beating around bush, look at the money their spending on marketing there pretty much saying "hey put away your Wiis and Moves and play our thing instead, its much cooler!!!" their going right for the casuals, no cloak&dagger with them. This aint catered to the core gamer MS has them already, im willing to bet most XBOX360 fans will get it JUST because they love giving MS their money, no matter how the end product will turn out. im not even a MS fan, but I have to say bravo MS, bravo I think you have a hit. seriously
Many games on the Wii may not be "High Quality" based on some arbitrary standards of elitist hard-core gamers, but that doesn't mean they aren't high quality. While Wii Sports was (initially) criticized for having a handful of "mini-games", many mini-game collections with 10 times as many mini-games had a small fraction of the enjoyable game play because they were (comparitively) so low quality.
In many ways making a simple game that is fun and enjoyable is far more challenging than making a "deep" game, and the difference in quality can be more obvious; unfortunately, many people see complexity as quality and can't understand the value of simple games