My thoughts...
I imagine that within Apple there exists a roadmap, with both hardware and software releases timelined, along with aspirational targets, such as new technology that hasn't yet been invented/made cost-effective.
Repeated comments suggest this to run to about 3 years into the future.
Comments from the SJ biography tell us the design studio contains a room where all upcoming products across ranges (confirmed and prototype) are laid out, and played with. And that this represents the next 3 years or so.
And then this roadmap will be susceptible to change - both positive and negative. New ideas/technology will add. Stuff that doesn't work will go. Problems will delay. Acquisition of companies may accelerate.
What we don't know from the biography, or from reports, is the impact on Apple's plans of competitors and rivals' technology. Apple's culture of focussing on their own development, and not listening to their customers' wants, surely doesn't mean they don't watch what other companies are doing very closely indeed? I assume they have a room where they have all the other smartphones and tablets, and play with them to see their strengths and weaknesses?
But what I think the loss of Steve means to the company, is the loss of an arrogant, rude leader, who would refuse to admit he was wrong, and would drive people/employees to produce something they didn't think was possible. The biography is filled with tales of deadlines thought to be unachievable suddenly being met after forceful input from Steve.
IOS 7 is an example of this. Removing Forstall, and reorganising management structures may have stalled progress a little, but will hopefully reignite passion.
But is IOS 7 enough?
I'm ready for a surprise. Whether product, or concept. Something no-one was expecting. Innovative. Perhaps even controversial.
I would love for Cook's next keynote to not follow the same old identikit presentation sequence we can all now predict.. it's time for a "wow". It really is.
I hope there's a "wow" drawn in big red letters on Apple's roadmap whiteboard, and it's this year.