Apple is more of a "love mark" than a technology company. Back in 95, Microsoft was a love mark, people loved it when a new version of windows came out, now people dread it.
People started looking for an alternative and Apple was there, all different and shiny. It wasn't 1 year that turned them around, its the result of 12 hard years.
Microsoft released a tablet back in 2000, did anyone care? Apple does it and millions rush to buy it, they have created a following, this is not easily replicated. They innovate, amaze and move onto the next thing. There is nothing simple about this process.