Java on Google App Engine

I think that the number one issue with JavaFX is that you have to learn yet aenohtr language, and with little gain. There's a number of existing languages out there that can do what JavaFX does, why having to learn something else? This new language is ugly (you can get lost in the brackets a la LISP) and the metaphor is quite different from Java, which means a big learning curve for Java programmers. I wish I could be more constructive in my comments. But the more I think about it the less I see how this can be good for Sun.