The process continues until it produces an enzyme that efficiently catalyzes a desired biochemical reaction.
Basically, if an organic substance occurs naturally as part of a life form or the process within a life-form, we would be able to create it without the original life-form - meat without animals, carbohydrates and sugars without plants, oil without dinosaurs, etc. We could turn waste into valuable and useful materials, CO2 into C and O2, develop drugs and molecules that presently are impossible or vastly expensive to produce now, etc.