SQL Developer usefull?

I just saw Oracle released the Statement of Direction for SQL Developer on OTN.
In the document you'll find some features planned for the next releases.

I'm sure SQL Developer can help any APEX developer.
Some of the features I think we miss in SQL Workshop, but are/will be available in SQL Dev:

• SQL & PL/SQL beautifier
• Explain plan support
• Autotrace support

Sue Harper, Product Manager of SQL Developer, blogged some screenshots of new features here.