This “leaked” image (which I am still not convinced is the actual Apple Phone) illustrates how the touchpad would work. It would, apparently be back-lit where the numbers would appear when needed, and other interfaces could load as well.
The Article reporting this goes on to further validate it, by showing that the technology for this already exists in the product in the YouTube video below:
So, what do you think? Does this seem plausible? I just don’t know…