Blackberry is still going strong against apple in sales
nytimes.com
nytimes.com
It's only logical that the blackberry will reach a market limit within the already mature markets but will expand in international ones where its presence is relatively new.
Blackberry does have the money and R&D chops to innovate before its demise(if that will ever happen). People have been saying the same thing about Microsoft for the past 15 years.
The main features people look for are not so much apps and stuff, it's more: is there an affordable prepaid plan for this, and can I get on Facebook/Twitter/email?