I think apple has a great lead and will for sometime because the same reason Google does. - they were first to market with an "ah-ha" Idea; when google search

I think apple has a great lead and will for sometime because the same reason Google does. - they were first to market with an "ah-ha" Idea; when google search worked it was an "ah-ha" for many people and most stuck around - today you see google as a "verb" - when I first saw the Ipod it was an "ah-ha" moment with the wheel and the way to legally get music built in. Although I have come to realize that their weak point is their proprietary format. - what I'm trying to say is they both have something that others can't easily replicate, its not a feature or killer product (Although it started that way) its now a "Brand" and a huge chunk of users that adore them.