So the showcase was originally designed to help with site migrations - particularly with old school plugins like vbgarage. However, it was also there to help migrate blogs and journals. Now, it can be used for any number of things. It can be customized on a site by site basis, with adding new categories, item fields, etc.
Here is a great example of using it as a garage feature - 130i.
If you guys want to make it much more roblox friendly, let me know and I can work on it with you all.