I wanted to let you know that later today a required Xbox One system update will become available. This update works a little bit differently than what fans are used to on Xbox 360. Here’s what you can expect: This update addresses the following: Addresses SmartGlass issues for some users when coming in and out of connected standby Addresses multiplayer issues for some users when re-joining games Addresses issues with inconsistent notifications for some users Addresses dashboard performance for some users Offers improvements for Xbox One’s TV, system update, and content update services for scaling over time Updated wireless networking driver to improve connectivity issues for some users Source - http://majornelson.com/2013/12/10/xbox-one-system-update/
It will only become available to those that have the console in "standby" mode aka voice power on/off .. The rest of the people will have to wait till Thursday/Friday