I agree, but I do not feel this will happen until they are eclipsed by vastly superior devices, or simply misjudge future market trends and miss out on the next big thing. With a war-chest of funds, Apple is capable of cornering each market it is in and secure any hardware it desires (a la the iPads Retina display). Considering they've essentially set the trend in MP3 players, Cell Phones, and now Tablets, they will more than likely be an unstoppable force for at least another half-decade.