It would be nice if, like most email services, these major and forthcoming messaging services could somehow interoperate in the same client of your choice, so they could all somehow learn your preferences and you could use a single scheme of settings and preferences to control their behavior (maybe you could “snooze” them) and their notifications. But that seems highly unlikely. Palm’s webOS operating system had a feature something like this called Synergy, but it’s defunct.
Or, you know, Apple, Microsoft, Facebook, Google, etc. could come together and create a single, open, open source, standardised messaging platform for which everybody can make clients. They could, perhaps, call it “Extensible Messaging and Presence Protocol” or XMPP.
Of course, that would require those companies actually giving a rat’s bum about their customers, which they don’t really do, so suck it up, Mossberg.