Are these accessories useful? Only time will tell.
They definitely look like they could be.
* Wall Mount for Kinect, SRP: $14.99 – The Wall Mount provides a quick and easy solution for mounting your valuable Kinect for Xbox 360 to the wall
* TV Mount for Kinect, SRP: $39.99 – The TV Mount uses the VESA spec standard as a one-and-all solution for mounting Kinect for Xbox 360 to any size TV (from 26” to 60”)
* Cable Extension for Kinect, SRP: $49.99 – The Cable Extension for Kinect will allow you to extend your connection by over 9 feet, allowing you to place Kinect for Xbox 360 virtually anywhere in your living space
* Floor Stand for Kinect, SRP: $29.99 – With a large tripod base and secure locking mechanism, the Floor Stand is designed to allow the Kinect Sensor to be elevated above the floor to help protect the Kinect for Xbox 360 from foot traffic and dirt
50 bucks for a cable no thanks
It's a long cable.