Rumour has it that Apple is planning to replace its entire MacBook product stack with ARM models within a year. Apparently, a MacBook Pro 13 with ARM silicon is arriving before the end of this year, which will be swiftly followed by an ARM MacBook Air. 14-inch and 16-inch ARM MacBook Pro models will then arrive by Q3 2021 at the latest.
https://www.notebookcheck.net/MacBook-Pro-13-and-MacBook-Air-with-ARM-processors-to-enter-mass-production-in-Q4-2020-ARM-powered-MacBook-Pro-14-and-MacBook-Pro-16-joining-in-mid-2021.480959.0.html