Just want to share what I found. https://github.com/DevanaLabs/lemon.email-dApp

This is a completely decentralised email service. The back end is built with smart contracts on Ethereum, the front end is stored on IPFS which is also decentralised. End to end encrypted and everything is either stored on IPFS or Ethereum.

No ICO, no coin, but a completely decentralised web service. This may not look impressive but it is actually revolutionary. As long as there are seeders on IPFS for the front end, this email service cannot be taken down.

This shows a very real use case of Ethereum in action. There are completely decentralised websites and blogs being hosted on IPFS and the front end for dapps can be hosted on there.

The more knowledgable people here probably already know this but I put this here because a lot of people don't seem to understand the implications of having a public blockchain like Ethereum.