https://www.cnbc.com/2018/03/01/idc-data-apple-watch-on-top-of-wearables-market.html

Apple Watch is slowly but surely cornering the wearables market — and the field of rivals is thinning as competitors flee the industry, according to new research from IDC.

About 37.9 million wearables were shipped in the 2017 holiday season, up nearly 8 percent from the prior year, IDC analysts estimated in a report published Thursday. And for the first time, Apple is the single biggest shipper of the units, selling 8 million wearables — a 21 percent market share and a 57.5 percent year-over-year jump.