In short, high end specs that match the best Android has to offer, but the OS is insanely focused on messaging capabilities to the detriment of the rest of the platform. Step outside the focused remit of the BB10 developers and the Z30 stops being an effective smartphone.
BlackBerry is now clearly playing in the niche category, but messaging and connectedness is a good niche to be in. If they can navigate their current corporate issues and still be able to develop the OS and handsets with limited runs in twelve months time, they’ll still be around inn a form where they can serve a subset of smartphone users with insane focus.
I’ve reviewed the Z30 handset in more depth on Forbes, head over there to read it in full.