After the transition to digital TV our broadcasted signals mostly look like noise, though. Maybe an outside observer would assume that our civilization ended sometime in 2010.
Analogue TV has always felt so much more clever than digital TV to me, at least from a purely technical standpoint. I guess that's because we're mostly digital natives now, so video codecs seem ordinary and programmable electron rayguns do not.
We are already using spectroscopy to gain insights into the chemical composition of exo-planets, and we have barely begun doing this kind of research. In even just a few decades we'll be massively better at this.