Many research companies have said this in the past.
The problem being is that the mouse is soooo versitile that unless you want 5 different input methods it's going to be around for even longer.
Example :-
Touch screens - great for manipulation, poor for gaming.
Trackerball - great for CAD etc, not bad for gaming.
Gesture movement - great for exercise, great for specific areas, poor for confined spaces, poor for specific software.
Mouse - not great at anything but good at everything in almost any space.
When something is capable of this you know its going to have the stay of time.
(I only forsee it becoming redundant when physical input is no-longer used, i.e. brain-wave readers, neural uplinks etc, but I truely doubt these will occure in our lifetimes)