Microsoft just posted the above video which summarizes the announcements they made at the Xbox Reveal event few hours back. The new Xbox called Xbox One will come with 8GB RAM powered by custom designed chip manufactured by AMD. It will also come with new Xbox controller and new Kinect sensor. The new Kinect 2.0 sensor will support upto 1080p video with 30fps color video capability. The new Kinect sensor is powered by a custom CMOS sensor designed by Microsoft.
Microsoft also announced a whole new UI with support for Live TV, etc,.
Read more about it here.