I hope they do, since more competition is always good for consumers, but realistically I doubt it.
I'm an ex-BlackBerry user. You probably wouldn't have known me from CrackBerry, since I was already here and using Windows Phone before you joined Mobile Nations. Long-time members might remember me as lak611 (my old handle before I started using my real name). I joined CrackBerry in June 2009.
I waited for almost a year while being out of contract and eligible for an upgrade. BB10 was "coming soon". I finally had enough waiting and chose the Nokia Lumia 900, since I had been a Nokia Symbian user prior to using BlackBerry. That was 2 years ago, and I do not see myself using anything other than Windows Phone at this point, especially now that 8.1 is available.
As a legacy BlackBerry user, I was completely perplexed by BB10. I played with the Z10 at the T-Mobile store in April 2013, and I could not figure out the gestures. It took me 10 minutes just to figure out how to open the browser. I'm not new to smartphones, but BB10's UI felt clunky and unintuitive to me. I can go to a store, pick up an Android or iPhone, and just start using it with no issues. I was at an AT&T store last Saturday, and I picked up a Samsung Galaxy S5, found the browser, looked up something, and installed an app using Google Play in around 1 minute.
Of all the current smartphone platforms, BlackBerry is the only one that is difficult for me to use. Yes, I'd probably learn it if I had to. However, I prefer using something that does not require reading a manual to figure out. I'd imagine many consumers feel the same way I do. That is why I think BlackBerry is not selling.