Learned Indexes in PostgreSQL?

Hi,

This is an awesome paper about a new index called "Learned Index".
it's aka dense hash structure derived ("learned") from actual data.
Looks very promising for certain properties [*].

Anyone already working on this in Postgres?
How could this be implemented in Postgres?

:Stefan

[*] "The Case for Learned Index Structures" Kraska et al. (Dec 2017)
https://arxiv.org/abs/1712.01208