The Internet and its social platforms has opened up the world to us, and allowed us to get true information, instead of being fed government propaganda through CIA controlled outlets like CNN and MSNBC. But the current push to censor people under the guise of hate-speech laws is a big threat.
EOS will allow censor resistant social platforms to be built. That is a huge deal imho. There are many other use cases for decentralized apps, this one is just the most important one I can think of. And this is the explanation of why EOS is not overvalued.