Preferred = high battery life(no need bring charger) , touchscreen able to transform to tablet, as light as possible , detachable screen
Brand = any
Budget = below 4k
Usage = surf the net and lite gaming (2D indie games ), programming homework
Preferred laptop/screen size = below 13" (as light as possible)

so far i am eyeing on Lenovo Yoga 13(non detachable screen) seem like i dont have much alternative ATIV pro is always out of stock and i dislike the plastic like feel from Samsung....

Any suggestion on weather should i continue to wait for better up coming ultrabook ??