Probably I'll take this bunch of ideas as a base to write my presentation in the next GWT.create conferences.
It comes plenty of new features like Promises, a new Events mechanism supporting bitless and custom events, Browser class to include/exclude blocks of code in compile time, Console class for accessing modern console object, and CSS3 animations by default.
- GQuery.Ajax works in the JVM, hence you can safely use it in activities and presenters, and even in server side.
- Ajax, now allows sending DataForm objects and progress callbacks are updated in the returned promises. So it is easy to add progress bar when uploading files or downloading large chunks of data.
- Json data binders, also works in the JVM, thus you can use the same code in both sides to offer REST services.
GwtQuery a.k.a. GQuery is a jQuery-like API written in GWT, which allows GWT to be used in progressive enhancement scenarios where perhaps GWT widgets are too heavyweight. It can also be used to find and improve your GWT widgets.
GwtQuery is easy to learn for those using jQuery as they share the same api, aditionally gquery adds nice features like type-safe css, compile time optimisations, etc.