it means that YOU are the controller of it. "I" refers to whoever owns the iphone, ipad, or ipod. so in other words, its YOUR way to control it how ever you want. (also iPhone, iPad, and iPod sound and look better then youPhone, youPad, and youPod)
a laptop is like a smaller, thinner, portable computer. an ipad (or youpad, since ya cant use the word i) is like that but smaller, has a touch screen, can have much more capacity, has fun apps and much cooler games than u can get on the laptop, and is, well.... just AWESOMER!