Today David Booth came through and together with Vaadin composed the complete results of the GWT survey. A really big thanks for all the work they have done!
You will discover a lot of comments in the document from me, but let me outline a few important decisions. GWT is very healthy: about 90% of the people doing GWT would choose to use it for their next project as well.
I was amazed by the number of people who are using mgwt / phonegap to build their projects for mobile.
The three main things which I felt were missing from GWT (fast compiles, a better CSS3 parser and more great looking widgets) were named a lot in the survey. The good thing is we are already working on the compile time with super dev mode which will have it's best days still ahead.
Fast and beautiful widgets that leverage new browser features are still missing, but if you take a look at mgwt this can be done pretty easily. Why don't I build something for desktop as well?
Those are just some quick thought, read through the report yourself and make up your mind. GWT is healthy with a very good community.