A bad game that was demonstrated with one wandWhy is the wizard game on PS3 using two wands instead of one, or a nav controller + wand. Why is it also on rails?
One of the reasons why Kinect takes so much CPU AFAIK is because it relies solely on image and depth processing to understand whats going on from the user. Movement or action mapped on analog stick, or a simple button pressing or a simple shape changing size is less intensive than trying to read a variable body part doing a movement in 3D space which has to translate in action on screen. It can be assisted by another device than let everything solely on the Kinect. Someone who knows better can correct me on thisBecause if Kinect captured at 2560x1440 and processed 4 full skeletons 1:1 at 60 frames per second and did all that with only 1 byte of RAM overhead the next complaint would be "pew pew pew". It's neverending dismissal. Just like the dialog after Kinect's initial showing was all about where's my object scanning, and where's my voice recognition in hardcore games at least, etc. So this E3 you get all that... and what's the response? Nothing to do with Microsoft delivering on every bullet point. It's all fallback to lag, response time, etc.
Again, with the all solving wands, why were games on other system still on rails?
Because they are not basic things. Because you're asking for the equivalent of real-time ray tracing, in a complex environment, not even on the PC yet, and oh yeah you want it on 6 year old hardware specs.
Because being a jack of all trades and a master of none does not guarantee a surefire hit with said consumers. Some people find an abundance of choices as constricting as not having any choices at all. That concept is very hard for some people to understand. Look at Apple's meteoric success and you just may get it, and how I'm worried about Wii U's complexity compared to Wii.
As far as other games being on rails I dont know where you are getting at, they just happen to be some just as there are games on rails that are using a traditional controller. There are examples of complex games that arent on rails and are using motion controls.
Now regarding your last point you are assuming too much complexity when there isnt necessarilly any. There is simply a kinect and a device with analoq stick and maybe 4 buttons. Its the same layout as the Wii and it didnt prevent it to sell like hotcakes. Only this time some games can be even simpler than what we got on Wii and can be played without a wand like device if the developer decides to make a game without it