A cool tidbit shown in one of the screenshots is that Apple Pay will be unlocked to other browsers. It is not clear whether they will need to be running WebKit or not for this to work, but looking forward to support in Orion.
Given that all relevant browsers on macOS either bring their own WebKit build or run another engine, system-WebKit only would be close to false advertising, so I really hope it's not.
I'm really looking forward to this – big fan of Apple Pay, but I'm not switching to Safari and rebuilding my shopping cart for non-logged-in purchases, and that's where it's arguably most useful.
