Interesting to compare the replacement of the legacy platforms with the 'future saviour' platforms at RIM and Nokia. Neither is going terribly well.
Of course, the underlying problem is that though both platforms are perfectly OK (though with their flaws), they're radically sub-scale. iOS now has about 400m active devices (iPhone, iPad and iPod Touch, though obviously with overlapping users) and Android over 800m, plus China. Lumia and BB10 combined have sold a little over 23m units in the last 18 months. As a developer, why would you target these?
It's also interesting to ponder what would have happened if both companies had swallowed their pride and gone with Android, or even forked Android. I don't actually think Blackberry would be in a better position, but Nokia might have been.