>Once you reach that level then the best you can hope for - without increasing the range - is to maintain market share
Absolutely, hence the talk about the Next Big Thing. Remember that Apple made their money by increasing their range, i.e by entering Sony and Aiwa's personal music player market, and entering the music distribution business. Later on, it was Nokia's lunch they ate. (yeah, I'm over generalising)
Biting the hand that feeds IT
