I've always thought of RIM as Palm Pilot, the next generation. The same people who bought the first PDA's from Palm were the first to use Black Berries. Carrying contacts and calendars around was, and is, a very good thing. But, when Black Berries did that, plus email, Palm's weren't competitive anymore. It took awhile, but Palm has all but disappeared (I know, Palm is now buried in HP somewhere.)
Well, email on a phone isn't a big selling feature anymore. It's all about the apps and web access. Email is just the bare minimum - a minimum that RIM couldn't even meet on their Playbook tablet launch (WTF!?)
So... as a Canadian, I'm sad to see RIM's decline. The game isn't over yet, there's still value in the Enterprise and Government sectors... for a while anyway. But, I think their days as a consumer brand are numbered. There really isn't room for 4 platforms in the mobile space... even 3 platforms is pushing it. iOS and Android are here for at least the medium term. Windows Phone and RIM have to fight it out for a distant #3.
If I had to bet, within 5 years, Microsoft will buy either all of RIM, or the pieces - both largely serve the corporate markets.