Articulating Screen – Is it useful in a DSLR?

Articulating screen - is it useful in a DSLR
The above photo was posted by Sudhir Shivaram in his Facebook page. (imgae link) My interest was immediately piqued. I understand the pain of looking through the eyepiece at such low angle (think macro photos). So I wanted to know what wildlife pro photogs thought about an articulating screen.
The following conversation took place based on my question.

Advantage Of An Articulating Screen Discussion
The gist of the conversation – Yes, articulating screen is useful. But remember to put the mirror in lock up and use a remote trigger to fire the shutter. That way there is no shutter lag created by the live view mode.
Sudhir responded to my request for a comment. Here is his response.
sudhir shivaraman response