Lenovo announced the convertibles Yoga 900S and Yoga 900 BE at CES. The convertibles, which are made of carbon, are lighter and more mobile than their predecessors.
http://www.notebookcheck.net/Lenovo-announces-Yoga-900S-and-Yoga-900-BE.157171.0.html
I would be interested in reading your review about the yoga 900s. This is a beautiful hardware, however i do not think i will buy one as it lacks thunderbolt 3....