My current point of view: If you have a large base of Java developers who don't or can't switch to JavaScript, GWT is a good choice. BTW you will also need a framework for your "complex front-end logic" JavaScript code. If you don't go for GWT you should look for good MVC JavaScript framework: Ext.JS, Cappuccino, Sproutcore, Sammy.JS ...

Thanks for responding :-)

It turned out nobody else had much to say here, but I posted at /r/javascript ... if you're curious, here's what's going on there:

http://www.reddit.com/r/javascript/comments/dppwu/ask_rjavas...