lal
, I don't think a touch screen would make picking the focus point any better in live view (but may be a faster yet less accurate way). I still visualise the arrow keys doing the job better.
I meant that when you touch on screen it will focus on the point right away.
Using keys you need to select the focus point then you need to press half key to focus. Why I am saying is, focus points are increasing these days.
For a 51 focus points, if initial focus point is in the middle and if you want to select edge focus point you need to press atleast 5-8 times keys to focus, and then you need to press the shooting button half way to focus.
Using touch (even inaccurate) you can select the focus point with focus in one go.
Think of a family member who never used DSLR, to shoot potrait they just have to touch on face area then shoot. That's it. Just like smartphone.
Anyway, these touch screen in camera are targeted to enthusiast DSLR with tiny viewfinder.
A experienced photographer never uses live view. A actual viewfinder with pentaprism in advance cameras are so good that live view looks bad.