Not bad, but i'll have to see with my own peepers.
- Spotlight : online search only for U.S users
iCloud Drive looks promising, but i hang on like a tiger by my claws if i don't like something that's bee done in the past.. like hacks..
Apple may bring me hog dogs to try and tempt me, but I'm happy with Drop box.
However if they do "streaming per page" (eg u don't need to wait for 50MB pdf to download just start reading), then this may make me to switch.
- Mail, if i heard this mail, attachments too big will be stored i iCloud with a link in email ?
This would be good, however knowing Apple's history with iOS and not encrypted attachments, i wonder if a repeat will be here too.
- Safari, I like a birds eye view,, who doesn't

just as long as i don't fall.
Private tab browsing = cool..
Just like Firefox.