We can do that already by recording a rosbag and then reading the data back on a laptop. Or by port forwading, changing rosmaster and blablabla.
This is just a quicker way to diagnose stuff. I do forest robotics, and when I'm in the woods with my robot the lesser fiddling with my laptop I have to do, the better. It's always great to be able to quickly verify that all sensors are working properly before starting an experiment.
If you have just ssh, why not gzip the data, and plot it on your laptop?
I think you should consider modern tools instead of ascii art plot, cf: https://saitoha.github.io/libsixel/