In this future, most people have some sort of cybernetic enhancements, but The Major (Johanson) has a fully cyborg body.
Two new Ghost in the Shell posters were released today, one featuring Scarlett Johansson (The Avengers) and the other featuring the robotic geisha we saw in the trailer.
In addition to the Ghost in the Shell posters, Empire posted a brand new pic that shows Major on a motorbike.
The film is based on the manga by Masamune Shirow (first published in 1989) and the resulting 1995 anime (with some elements from the 2004 sort-of sequel Ghost In the Shell 2: Innocence).