Just to clarify, this forum and discussion is not about apps. It's about a piece of hardware, the new MacBook Pro.
Not sure why people are so confused between hardware and software. Please go read about the difference if you think they are the same thing, it's useful to know how modern technology works.
Btw - yes, Safari hasn't been updated, but there is nothing mis-leading or falsely advertised. They never claimed Safari would support ProMotion in the first place.
Btw - please go post here, this is the wrong forum:
https://forums.macrumors.com/forums/mac-apps.2/