Couple of points
If you look at Guys previous work, hes not always right in fact, hes not a particularly great journalist.
The claim that Apple has prototype(s) with keyboards isnt exactly Earth-shattering Im sure that this was something they looked at. Maybe its not looking into this anymore, maybe it is time will tell!
Before Apple introduced its first mouse, it made a one-button, two-button and three-button version before deciding which one to produce. It went with the one-button, because as people were unfamiliar with the concepts of GUI or mouse, this was the one that people got to grips with. Although there were versions with more than one button, it took the company a rather long time to sell them
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