IDC predicted global wearable device shipments will hit 111.1 million units in 2016, a 44.4 per cent increase on the 80 million units it expects to have been shipped in 2015. By 2019, the final year of the forecast, total shipments will reach 214.6 million units, resulting in a five-year compound annual growth rate (CAGR) of 28 per cent. The research company commented that the market will see continued growth as second- and third-generation products reach the market. These new devices will build upon the hardware and software of their predecessors and answer some of the shortcomings and concerns that potential customers have today. Smart watches will be one of the most popular wearable form factors, reaching a total of 34.3 million units shipped in 2016 compared to 21.3 million units in 2015. By 2019, smart watch shipments will reach 88.3 million units, resulting in a five-year CAGR of 42.8 per cent. Report