Then maybe the new Thinkpad X1 Carbon is for you: http://shop.lenovo.com/us/en/laptops/thinkpad/x-series/x1-ca...

I would seriously love to buy it but the new keyboard changes put me off (see comment on https://news.ycombinator.com/item?id=7016535). It's a shame, because otherwise it is really a nice machine - will as well go with T440s.