the word studio is derived from the Italian: studio, from Latin: studium, from studere, meaning to study, zeal, painstaking application.
A room where an artist - a photographer, paintor, musician, etc - works. By work we can understand study, for all work needs study in order to be performed or produced.
Many photographers, and many very very good and successful photographers, do not own a studio, a commercial studio. Many photographers that do own a studio, a commercial studio, may not study in it. Part of the meaning of the word is being slowly forgotten and less than ever photographers study in the studio, myself included I guess.
This photo above is just a study, nothing else. A reminder that as simple as it may be, studing is one of the cornerstones of photography.
PS: I forgot to mention that this photo is based and it's supposed to be a reference of a Eugène Atget photograph, Saint-Cloud, 1921-22. The way he creates several triangles thoughout the image. Check it out: http://www.masters-of-photography.com/A/atget/atget_cones.html