Yeah, it does fill a gap but what appears to be a temporary one. Web apps can already be installed like an application, and now include window-control-overlay a

Yeah, it does fill a gap but what appears to be a temporary one. Web apps can already be installed like an application, and now include window-control-overlay amongst other things. At one point I think Safari was slacking, but may have mostly caught up. As you mentioned, once an option exists for passing messages from browser to a native app (similar to Native Messaging but for Web Apps) then it would make more sense IMO to just use the browser's existing support.