To me, that doesn't make much sense; the whole point of a smartwatch seems to be making the reading of notifications more efficient and unobtrusive. If you disable all except the rare urgent ones, what's the point of the smartwatch?
Notifications are inherently intrusive. You have to pare it down to the set of notifications you care about most so that you aren't constantly interrupted. I made the mistake, recently, of letting the News app on iOS notify me, no sound but near constant visual noise when some big news item comes up. All I care about is: chats and calls from girlfriend, family, friends (in that order), a couple chess games, calendar/todo notifications to keep me on schedule (particularly on busy days). Everything else, I can check at my leisure. If I had a smartwatch, it'd be convenient to have those on my wrist. But I certainly wouldn't want all those news notifications there, though I may still want them on my iPhone or iPad.
