I think so.

This debate about language preferences can get religious and being an atheist I know how that goes That's not so to say that Groovy is the only religion language that should exist. Horses for courses, right ? But, I think Groovy is good. How good ? Well - really good. Off the cuff in no particular order here's why:

• Groovy code compile to Java bytecodes - Java tool support, Java Security, Java EE ...
• Syntax is simple - code more maintainable
• MOP (Meta Object Protocol) - enables some wicked maneuvers
• In-built XML support - unbelievable how simple it is to read/write XML
• Groovy has Grails !
• ... and more. You can find the entire feature set on the Groovy site.

Currently only Rhino, a JavaScript interpreter, is bundled with Java SE 6. The Java platform is capable of integrating with any script engine conforming to JSR 223, and it can't possible bundle ?-too-many scripting engines out of the box, but Groovy and (the language) Java seem to be a perfect fit. Is the Groovy gravy spicy enough for Java's palate ? I hope so ...