X is a native remote desktop system. It just happens that we generally all run our apps on the same machine as where X runs, nowadays. Sadly playing around and

X is a native remote desktop system. It just happens that we generally all run our apps on the same machine as where X runs, nowadays. Sadly playing around and learning how it works is trickier than it used to be now that X doesn't listen over TCP by default (...because the protocol is unencrypted and unauthenticated... can't argue there), but google "SSH X forwarding" for a reasonable startpoint that's still fairly universally supported (you can even get X servers for Windows that work with PuTTY, and it all works natively on Linux and macOS).