I have recently upgraded form 4 year old X1 Carbon to new X1 Yoga. Bottom line is I'd recommend the X1 Yoga over the Carbon.

Here is my original X1 Carbon review: http://blog.itaysk.com/2013/05/04/lenovo-x1-carbon-touch-rev... And here are my thoughts on the X1 Yoga: http://blog.itaysk.com/2016/12/30/from-lenovo-x1-carbon-to-l...