I've checked this out: https://decentraland.org/app and it's really funny even though very little is there to see yet. Will be really cool once people can actually go and meet there to explore and build

this way I can actually imagine how VR collaboration and fun will look like in the future. so what I see are a few sample parcels of land, and Greenpoint also is a place like this in the virtual world where we can meet up!