Where did you get these stats?
There are a lot of people who prefer other products over Apple's in the same way that there are still a lot of people who still prefer a feature phone over a smartphone.
http://www.businessinsider.com/through-may-apples-ipod-had-7...
Ok - so I was off by 4% - 24% of people pick non-Apple mp3 players.
Now, Android phones are genuinely competitive with the iPhone, but they got there because they had real advantages in availability and price from day one. Android tablets don't have those advantages.