A wikidata project could use semantic mediawiki from
the outset, and
be seeded with data from dbpedia.
A lot of existing & proposed projects would benefit from a centralised
wikidata project. e.g. a genealogy wiki could use the relationships
stored on the wikidata project. wikisource and commons could use the
central data wiki for their Author and Creator details.
+1
Could this be part of dbpedia?
SJ