The new Xbox update has started to roll out. The update is based on Windows 10 and includes the new Xbox One experience with a whole new look and feel, as well as backwards compatibility to some Xbox 360 games.
I must say, the new dashboard looks great, but it will take some getting used to.
The new update promises to be 50% faster, this includes getting to apps and games as well as performance. If your console has not automatically got the update you can go to Settings > System> Update System.