>"Touch on a conventional laptop is shit "
By which I meant the position of the screen on a conventionally-hinged laptop will always be sub-optimal. I stand by that. Devices like Yogas and Surfaces however, allow a more ergonomic, tablet-like position.
In my ideal world, I would have the two devices, but far better integrated.... i.e the tablet can work as a second monitor or stylus digitiser for the main laptop, or else be taken into the next room for sketching or watching a movie.