IF the OS is optimized for touch, then yes but at the moment OS X, isn't. MS had a bit of rough go, trying to make windows touch enabled, they made a fair amount of mistakes, hopefully Apple wouldn't repeat those mistakes, but the point remains. There may be rough edges to the OS if Apple were to do this.
As for using a touch enabled laptop vs. non-touch. I find the touch screen to be more intuitive, more useful and more flexible then a non-touch screen. The touch bar thingy doesn't change my opinion. I prefer a touch screen, and I use a Surface Book for that very reason.