Prices will all go down to what people can/are willing to pay!
Profits will go down to what everybody is willing to give you in return for services provided.

Anyway, its all changing... What are you going to buy when you have a 3d printer in your house? Materials! Nothing else!
Even 3d printers cam be 3d printed ( just ask your friend to print you one... pay him for materials and give him a tip!)

How is anybody going to find jobs (as we see jobs today) in this scenario?

Only services will survive!

Also.. forget all intellectual "pdeuso" property!
Its not enforceable since it costs nothing to copy!