LN-Address has demonstrated the value of human-readable names in Bitcoin payment instructions, but has a number of fundamental drawbacks -
(a) its only for lightning (b) it does not allow for succinct proofs of name mappings. This means you can't simply hand a hardware wallet a small bit of data to prove that you're paying firstname.lastname@example.org so that it can display that in the UI (c) it reveals the sender's IP address to recipients, resulting in a loss of censorship resistance and privacy as recipients geofilter and track senders, (d) it relies on the TLS CA infrastructure, which is generally a total mess (e) a user of a custodial wallet can't simply map their own domain to their payment info at the custodial service.
This proposal replaces LN-Address with a DNS(SEC)-based scheme, addressing all of the above drawbacks by putting standard bitcoin: URIs in DNS TXT records (which anyone with a domain can easily configure).
Thanks to t-bast for coming up with the high level idea here and writing up the original proposal. You can find a full implementation of this proposal at https://git.bitcoin.ninja/index.cgi?p=lightning-resolver;a=summary