Well, we know they're not, but the people that eat up all the ads Apple makes about their shallow privacy features you have to manually turn on don't.

"This thing is ambitious and compelling" says people selling you the thing.

They mean being able to group several windows together as tabs, rather than tabs implemented in specific applications.

"Scrolling moves the content" means the content moves opposite of the direction you scroll a la smartphones and tablets, i.e. scrolling up will make content move down.