Ok, so I've just skimmed past 100 posts of "grr gons, hat gons", and I have some observations to make:
1) The Mining meta in respect of Moon fields is currently largely unknown. However, we have the following statement from CCP in the initial Dev Blog:
This indicates the expectation that ISK/M³ (& therefore ISK/hour) will exceed ABG Mining in Anomalies.
What we currently don't know is if there will be restrictions on mining typology, either hard coded (per Mercoxit), or effective by rock size. If the rocks are extremely valuable by m³ but of a size that is too small for effective Rorqual Mining, that will enforce a different Meta than a Rorqual-Mining paradise spawned on demand.
2) The presence of regular Ores in Moon fields will have an effect upon the viability of LowSec and NPC NullSec industry. Both zones could see increased industrial player activity if those resident in those areas choose to go that route. So it's not all about Moon Goo - expect Moons with large volumes of valuable regular Ores to also be valuable, especially in those regions without Ore Anomalies.
3) The viability of ninja mining will depend to a large extent on the ISK/m³ of the Moon Goo Ore and their prevalence in the Ore Field. If we assume that CCP will want to encourage active Ninja Mining as a replacement for Siphoning, then ISK/m³ would need to be high enough for the Prospect to satisfy a RoI analysis.