Some of my first impressions:
1. It makes SQL Developer look like an ETL tool, such as Informatica or ODI, or a data quality tool like EDQ.
EDQ allows you to review the data step by step. You can also view the data as the results of given step in SQL Developer.
Informatica allows you to view data row by row via debugger. A tool like ODI, EDQ, or Data Miner, supports the Set process.
2. It also support the diagram tools.
Viewing a histogram is so easy.
It reminds me when I first learned Minitab in college.
The Introduction to Statistics course can use SQL Developer to teach some basic concepts and statistics, I think.