As silly as it might sound, the popular CryptoKitties app might foreshadow a powerful up-and-coming use case for ethereum – digital collectibles.
After its launch last week, CryptoKitties quickly became the most popular ethereum app – so popular in fact that there's now CryptoPuppies (for those that prefer man's "real best friend"), and CryptoPets (which lets users choose any kind of digital animal pet they prefer).
Strange as it may seem, your favorite furry fluffball is made possible by a powerful technical standard underlying CryptoKitties called Ethereum Request for Comments 721 (ERC-721).
"People have been talking about [ERC-721] for a long time, but no one implemented it before. CryptoKitties happened to be the first," Philippe Castonguay, developer relations manager for cryptocurrency exchange protocol 0x, told CoinDesk, adding:
"There's a very big market incoming for ERC-721."
more info:
https://www.coindesk.com/crypto-collectables-ethereums-next-killer-app-is-on-its-way/