Oh, I dunno about lately (though I did stumble upon https://a16zcrypto.com/posts/article/big-ideas-things-excite... )

But when I was in the crypto space in 2018, there was a lot of interesting things happening in the smart contract world (like proofs of concepts of issuing NFTs as a digital "deed" to a physical asset like a house).

I don't think any of those novel ideas went anywhere, but it was a fun time to be experimenting.