I am popping in to share an article that was published by Bitcoin Magazine, that can help the less technical of us to grasp the basics of the topic discussed here.
IMPROVING BITCOIN PRIVACY WITH SILENT PAYMENTSThe article is very basic and originates from Marty Bent's newsletter, but they claim they will update it when more details emerge.
Another "not too technical" resource is the following one:

Where I got a very clear overview of this technique. And solved my first thought about this (why it is superior to "xpub-sharing")
Just a couple of things that caught my attention:
The irony is strong with this one:

The second reflection revolves also around the BIP119 drama. Silent Payments are techniques which don't require any new functions in the bitcoin protocol. It's a very elegant and effective technique to gain privacy from transactions and solve a real problem. What I mean, so much remains to be "discovered" using the current bitcoin protocol, we cannot risk anything implementing a new feature which is secure and scrutinised beyond any reasonable doubt.