RCS is a technology touted as the replacement for SMS. It will bring rich, iMessage-like features to texting, and major carriers support it. And it sounds like Apple is interested.
According to the purported slide from the conference, Apple has “engaged in discussions with the GSMA and Operators about including RCS in iOS.” This is inherently vague and doesn’t offer too many details about the extent to which Apple is involved, but the pitch seems to center on three things.
I find it unfortunate that RCS seems to only support encryption during transport, and not end-to-end encryption. Governments around the world would probably not let end-to-end encryption become so widespread.