Hi there,
it is probably to early to think about phase #3 (lists), but success of this phase will largely be in integrating the wikidata output into Wikipedia tables nicely. I think about various live tables with all sorts smart functions available, like column filtering, dynamic calculations (counting sums, average values etc.), charting etc.
I know big part of this functionalities will be on Wikipedia side, but I fear there simply will not be wikidata integration enough in this was if your project does not take it into account... Has anyone been thinking about this issue?
Kozuch