Was there a gap in the first place? We could design temper-proof data storage since way before the blockchain. All you need is checksums, public key cryptography and a way to publish your signed checksums.

I'm not saying that this isn't a good project but it's a bit strange to frame it as if it was a major technical breakthrough.

If anything what catches my eye in this announcement is the "time travel" feature as well as the wire protocol compatibility with Postgres, that's pretty cool.