What is neo-noir?

Neo-noir (from the Greek neo, new; and the French noir, black) is a style often seen in modern motion pictures and other forms that prominently utilizes elements of film noir, but with updated themes, content, style, visual
It wasn't until after 1970 that film critics began to consider "neo-noir" as a separate genre by its own definition.
Unlike classic noirs, neo-noir films are aware of modern circumstances and technology/details that were typically absent or unimportant to the plot of classic film noir. In the films of the early 1940s and '50s, audiences are led to understand and build a relationship with the protagonist or anti-hero. Neo-noir films of post-1970 often reverse this role. Unconventional camera movements and plot progression remind them that they are merely watching the film and not partaking in the story.
Modern themes employed in neo-noir films include identity crises, memory issues and subjectivity, and - most importantly - technological problems and their social ramifications. Because these fundamental elements are as ambiguous in practice as their definitions, film theorists argue that the term "neo-noir" can be applied to other works of fiction that similarly incorporate such motifs. Robert Arnett states that "Neo-noir has become as amorphous as a genre/movement, any film featuring a detective or crime qualifies. It is because of this genre's ambivalence that neo-noir is still shaped and interpreted so malleably today.