There are already commercial products (like those from Good Technology), which offer sandboxing of private and corporate data/apps on mobile devices, primarily to reduce corporate fear of BYOD. Good rely on remote proxy key servers, PFS and other good tricks to make the sessions Quite Hard To Compromise/Crack (QHTC, I will register that acronym. right away).
If the BlackPhone can offer seriously good privacy as well, they may be onto something that corps will buy. Assuming of course that TLA obstinancy and stupid legislation don't completely undermine all people's faith in such tech solutions first.
Anon for the usual reasons.