The only things so far seem to target digital assets (cryptocurrency, music, movies, art etc.)
I think the primary issue always tends to be two fold: - Decentralized network applications (e.g. bittorrent) tend to be started against an established oligopoly or monopoly and then face the wrath of the establishment eventually - Massive scaling issues without the inclusion of some centralization
A perfect example of my second point is git. Git is the perfect example of a decentralized Merkel Tree based network solution. It grew and grew, but only really took off when the likes of Github gained a footing, using a centralized mechanism for discovery and sharing.
I feel that all decentralized applications will end up facing the same challenges. But the internet is huge, and DApps have grown substantially.
I am hoping to hear if there are any other massive or massive-potential decentralized apps out there?