What? Who cares about formfactor? My point is that EVERYONE is releasing a high end phone with an A9 core.
It is about what your competitors are doing. That's what everyone is comparing Nokia to: their competitors. Apple, Samsung, Motorola.
Indeed, you cannot. That doesn't mean no one can, or that no one needs a dual core.
Except that it is a feature touted by every vendor with a device on its way?
Regardless of how little use you see in a dual core processor here (I imagine you think my quad core laptop is excessive) there will be people who are more than willing to make use of it. Never mind the tech media who will have a field day if Nokia can't match it.