Sorry for the delay. But still I think it is worth to have attention to this subject.
OpenStreetMap is the Wikipedia for maps, thus it seems logical that we use it much in Wikipedia and Wikidata. However, I do have the impression that - even while we use some OpenStreetMap - the gap between the two organisations is still too big and I think it would be good to bridge it.
Probably one reason for this gap is that users from Wikipedia/Wikidata do not know that much about how to edit OpenStreetMap and how the data is stored, and probably for users from OpenStreetMap how to work with the data of Wikidata. Of course there are users who do know both, but I think this is for most users not the case.
It is easy to wait for the future, but I that would only delay the future of working together more deeply. I think we can all benefit more from a deeper collaboration. Therefore I would like to suggest the forming of a working group with core users from OpenStreetMap and from Wikidata to sit together on this subject.