By "modular", we mean that we've equipped the
NEXUS App with a public and documented
API, which allows the development of add-on content for the program. The app itself is just a small core optimized to integrate the APIs and load the modules, but it optionally comes with what we consider to be the most recommendable modules available for the app.
In short: The app's modular structure allows it to do
anything
a module developer wants to implement. Be it launching games, executing commands, wrapping other programs, or even doing something remotely.