In consumer electronics, ease-of-use is essential for users. The USB-IF created Certified Wireless USB to retain the same plug-and-play capabilities as wired USB. The association models spec enables manufactures to build host solutions that will allow one host to connect with up to 127 devices from different manufacturers -- all built on the Certified Wireless USB technology.
Microsoft has been most aggressive with Xbox Live, connecting the Xbox 360 to the Internet for game play and allowing users to download content, either paid or free. This is really just another step in that process to make what was a video game console into more of a living room entertainment center.
XBox appeals to the oldest demographic of the three consoles. Generally, Nintendo appeals to a much younger audience. Sony has covered the gamut from pre-teens to people in their 30s. Microsoft is trying to make their appeal to a younger demographic because there is a lot of money to be made among younger players.