RIM is a handset maker. Every handset ONLY maker is dead or near dead.
No matter how good BB10 is it will still have to rise above Apple's iTunes/Mac/iPhone/iPad synergies, Microsoft's installed PC/xBox base and Google's ability to give consumers free, ad-infested products.
BB10 is a Hail Mary pass that has yet to be thrown while the opponent is about to put the game out of reach.
Apple got out of trouble by conceding the enterprise to Microsoft. They attacked the consumer market and won.
RIM owned the enterprise and lost it. They admitted they won't pursue the consumer market.
What's left?