The document discusses the future of GWT 2.x as GWT 3 and J2CL mature. It notes that while GWT 2.x will continue to be supported with bug fixes and minor improvements, upgrading large existing GWT 2.x projects to take advantage of new features in GWT 3 like JsInterop may be challenging. GWT 2.x will also remain useful for projects that need to support older browsers or have minimal maintenance needs. Overall GWT 2.x is in a stable position but its development may gradually align more with changes in the GWT ecosystem and push projects to consider upgrading to GWT 3 over time.