We're on the same page here - planning is great, takling about it in this situation is quite short sighted.

On the other hand, if he'd say there's a new device coming in 12 months, it might strengten confidence that this is not the last device to be seen.

Let me elaborate on the 'Elop' part - I'm well aware of other things Elop's done (most likely on purpose), but when you read mainstream media analyzing the fall of Nokia, they surprisingly agree on one thing - one of the main causes was announcing future devices before launching the current ones. That is the sole thing I am comparing here.