Earlier quoted context omitted.
Earth's "radio bubble" is well over 100 light years across now. If there are aliens out there, they are probably already on their way to ask us in person why Ross, the largest Friend, doesn't simply eat the others.
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.
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.