Apple is not half the worldwide market
Less than10% first quarter
Depends on how you’re squinting at the numbers. >17% worldwide first quarter. http://www.theverge.com/2015/4/29/8512887/samsung-earnings-q1-2015-smartphone-market-share
However you evaluate it, ONE product is dominating all others.
But they have a little over half the profits. Samsung has a bit less. Everyone else loses money on smartphones.
In terms of the smartwatch market, Apple sold more devices in one day than Samsung sold in a year. That's a pretty emphatic entry.
As to whether or not it's a fad or for real, time will tell (no pun intended). But I notice a lot of the arguments made against the Apple Watch use similar themes as to the ones used agains the iPod, the iPhone, and the iPad (and, to a much lesser degree, the MacBook Air) when they first came out.