A "Field of the Invention" or "Technical Field of the Invention" section has been seen in fairly recently-granted patents, but not always. I have read advice that it's better not to include such a section because it may, in certain later circumstances of litigation, impose limitations. Is there a current consensus about this among experienced attorneys and agents?
(added for clarity): I am referring to a separate section near the beginning of the application, not part of "Background." Below is an example of the kind of statements that may be relevant in such a section. I would like to understand in what way could this ever limit the patent, since it is the claims that will actually define its scope.
The present invention is in the technical field of computing devices of both mobile and non-mobile types, encompassing both devices controlled by a touchscreen and devices controlled by a moving cursor. More specifically, the present invention is in the technical field of interface design and related functions for initiating and managing Internet and network communications involving ...(more detail here about specifically what its purpose is, from a user POV)