Possible future elements?
1) Contingent pledge options. Players might agree, for example, to crowdmove into a troubled neighborhood, once a universal membership homeowners association had been set up by existing owners. (Pledges also could include a reverse-Groupon commitment by the new residents to buy from incoming restaurants, etc.) Waterman Place — an integrated neighborhood in St. Louis — formed an HOA and took ownership of its street in response to crime. Its property values doubled in 12 months.
2) Community land trusts. Tenants who might otherwise be at risk of displacement, as property values rise, could be vested with shares in community land trust properties. (CLTs can be formed in greenfield or brownfield areas via transfers of idle city-owned lands, and generate income from auctioning leaseholds for lots to commercial ventures.) Neighborhood residents could earn shares in the CLT land lease revenues via sustained support for cleanup/fixup efforts, crime watches, block parties/popup art/music festival planning and promotion, mentoring and tutoring — all of which make the area more desirable and prompt rising land values. (In real life instantiations, proof of work could be via video uploads to Youtube as logged on the blockchain).