Taking a different approach to this, I think the value of goods in services, measured in sats, will ultimately be based on the amount of energy is produced in a somewhat locallized manner. There will always be price differences based on cost of living and other factors, but I think a major one of those factors will be the availability of cheap energy.
I'm curious if anyone has attempted to measure the value of bitcoin in energy, rather than its fiat value. There probably is an article out there, it's just hard to find by searching.
Essentially my thinking here is, for anything that you want to price, how much energy does it take to produce it? Then if you know how much energy it takes to produce one bitcoin, you have a starting point for pricing goods and services.