That doesn't really make a lot of sense. Cell phones existed in 2004. So did "smartphones". Really, the only major difference that you could use the word "marke

That doesn't really make a lot of sense. Cell phones existed in 2004. So did "smartphones". Really, the only major difference that you could use the word "market" to describe is the notion of a platform for general-purpose mobile computing, the key part of which is a general market for apps, instead of just baked in features on a phone.