Why are journals innovating peer review? Innovations are proposed with a wide variety of arguments, ranging from fairness to objectivity.
An overview for a general science audience in this guest editorial:
Halffman, W., & Horbach, S. P. J. M. (2020). What are innovations in peer review and editorial assessment for? Genome Biology, 21(1), 87. doi:10.1186/s13059-020-02004-4