Just because Apple is running on all cylinders now doesn't mean its going to be like this the next 5, 10, 15 years, every company goes through a cycle....apple is having their cycle now, who knows how long it lasts but right now they have everything going for them, these days it doesnt take much for another company to come in and start grabbing market share from another company. Simple as that, there is always something new and innovative coming along.