The benefits are:
At this time the quality of information about Wikimedia research is hardly satisfactory. As is the standard; announcements are made about a new paper and as can be expected the paper is not in Wikidata. The three authors are not in ORCID, as is usual for people who work in the field of computing so there is no easy way to learn about their publications.
What will this achieve; it will be the Wikimedia Foundation itself that will push information about its research to ORCID and consequently at Wikidata we can easily update the latest and greatest. It is also an important step for documentation about becoming discoverable. It is one thing to publish Open Content, when it is then hard to find, it is still not FAIR and the research does not have the hoped for impact. It also removes an issue that some researchers say they face; they cannot publish about themselves on Wikimedia projects.
Another important plus; by indicating the importance of having scholarly papers known in ORCID we help reluctant scientists understand that yes, they have a career in open source, open systems but finding their work is very much needed to be truly open.