Upcoming developments
Some of the ongoing developments are currently funded by the NLNet foundation. But other major developments are also planned.
Cross-referencing with external data sources
Flag discrepancies between OSM and other business or OpenData data sources.
External quality rules
Validate changes using external quality rules (JOSM validator, Osmose-QA...).
Contributor reputation
Take into account the "reputation" of contributors (beginner, flagged for bad contributions, statistical analyses) and changes (changeset discussions...).