Decentraland is a virtual reality platform, built on Ethereum. On the platform, you can explore the virtual areas and spaces, and also create your own 3D-reality via the VR headset (browser-friendly).
Everything you create on the platform is considered to be hashed blockchain-asset and can be accessed only by the creator (or holder of the private keys). And that feature is HUGE because blockchain is actually CAN provide a better ownership and it's only a matter of time when this becomes mainstream.