Rumour has it that Apple's first ARM-backed MacBooks will be hundreds of dollars cheaper than the company's current Intel-powered devices. The main source of savings will be Apple's in-house chipsets, which the company will seemingly pass onto consumers.
https://www.notebookcheck.net/Apple-s-ARM-based-MacBooks-may-be-significantly-cheaper-than-the-current-Intel-powered-machines.483235.0.html