The document discusses Selenium 2, which is the next generation of the Selenium web testing tool. Selenium 2 features a cleaner API, support for mobile testing, improved cross-browser testing capabilities, and future-proofing for emerging technologies. It provides examples demonstrating how tests can be more cleanly written in Selenium 2 compared to the older Selenium 1. While rewriting an entire test suite for Selenium 2 may not yet be necessary, its features represent the future of web and mobile application testing.