Samsung primarily make phones which run Google software, and unless Samsung want to do an Amazon and ditch the Google Play Services infrastructure for all intents and purposes they are Google phones.

Samsung sells lots of phones: how many of those phones are running Tizen (né Bada)?

I think the point the OP was trying to make is that it's highly unlikely we'll see a company collapse to the extent that RIM/BlackBerry did unless there's a major paradigm shift in mobile technology. Are Xiaomi going to be driving that? I'm not sure.