Automating responsive layout testing can help developers catch visual defects early on in their development workflow. By using Selenium with Applitools Eyes and Sauce Labs, developers can create automated tests that run multiple screen resolutions in parallel, allowing for faster feedback and reduced delays. The test suite is designed to be flexible, with environment variables used to specify different browser versions and platforms. Once created, the Rake task can be executed from the command line, making it easy to run the tests against each screen resolution specified. This approach enables developers to quickly identify visual anomalies and ensure that their application renders correctly across various devices, improving overall user experience.