Yes, analysts are predicting that Apple will take 100% of the iPhone and iPad market.
In reality, iOS market share in Europe is around 18% compared to 70% for Android; China is similar. In the USA it's 35-50.
I can see why Mozilla and Jolla are chasing the developing World markets; the market positions in the mature markets are pretty static now and are unlikely to fluctuate much. Anecdotally, people upgrade their phone on longer periods now ( three or four years ).