Installing a Rails plugin from GitHub has been streamlined to a simple command line action, specifically using the command "./script/plugin install git://github.com/pjhyett/auto_migrations.git," as announced by PJ Hyett. This advancement simplifies the integration of plugins into Rails projects, thanks to the collaborative efforts of contributors. The changeset related to this improvement has been made available, and future developments are anticipated to extend this ease of use to gem support.