Yes that is exactly right 😎
Well, that and it will also let you rip your carts yourself, so that you can make roms from your own collection if you want (but I personally haven't tried this feature)
Also you can easily roll back to default firmware if you decide you aren't interested in the jailbreak. But, it is strictly a superset of features. Installing the jailbreak firmware does not remove anything from the console, so generally it is always worth using.
Thanks for the response! I will definitely be trying this out. I just recieved my super NT... it is having trouble with about 80% of my old games... is that normal?