What your saying is right, but I don't think you get what I am saying.
In detriot, demand is low. I would never want to live there, and I don't think a lot people would either. All the other factors that your are talking about affect DEMAND they don't affect supply.
we are talking about a scenario were demand is remaining static, but the supply curve is moving to the right because of lower marginal costs per unit.
Moving from S1 to S2 in this picture
You're talking about a situation where the demand curve is shifting to the left.