From the article, "Xbox One software will get better from a technological standpoint, but it will come down to a range of factors - the most dramatic of which has little to do with Kinect. Development sources indicate that the DirectX driver is improving rapidly, but developers' increased familiarity with the hardware is also paying dividends - a state of affairs exemplified by the new Call of Duty: Advanced Warfare, which even in its pre-production form offers a 50 per cent resolution boost over its 720p predecessor, while also incorporating a wealth of new rendering technologies."
Interesting article. Sounds like between driver improvements, some more GPU time and Directx12, the Xbox One should see some appreciable gains in performance.