I have a question.
The purpose of a child theme is so the parent theme can be updated for whatever reason, bugs/errors, security, etc.
Maybe the about.php file isn't all that critical. But let's say you want to make changes to the header.php because you want to totally reconstruct the header div (what's the point in using display:none; if you don't even need the data being brought in). The file header.php contains some pretty important info like jQuery, etc.
So lets say you edit header.php for whatever reason - and the theme author makes an update. I'm just going to ask the stupid question here... at that point I assume the person who created the child theme would have the responsibility to know that the parent theme had been updated and to check/compare any child theme files for edits?
So you'd first want to try to make any changes (if possible) in the CSS and then modify any html, then any php. Eh?
I'm just mostly talking out loud to wrap my head around child themes. I've never had a parent theme updated so I don't know.