Gartner earlier predicted a growth of 1.5 percent.
“Replacement activity across all types of devices has decreased,” said Ranjit Atwal, research director at Gartner. “Users are extending the lifetime of their devices, or deciding not to replace their devices at all.”
Shipments in all categories will decrease in 2015, except mobile phone shipments.
Mobile phone shipments will increase 1.4 percent in 2015. Smartphone shipments are estimated to increase 14 percent in 2015. Emerging Asia Pacific, including India and Indonesia, will grow at 43 percent in 2015, while Greater China will grow 3 percent.
By 2017, mobile phone shipments will reach the 2 billion mark, and smartphones will represent 89 percent of the market.
The PC shipment market is expected to dip 7.3 percent to 291 million units in 2015 and show flat growth in 2016.
In 2016, currency impacts will negate. Microsoft Windows 10 products on the Intel Skylake platform will increase in volumes throughout the year, while Windows 10 adoption among businesses will ramp sharply in 2017, where PC market will return to a 4 percent growth.
Ultra-mobile shipments will dip 12 percent to 199 million units in 2015. Tablet shipments will drop 13 percent to 192 million units in 2015.
The report said users of tablets with a screen size between 7 and 8 inches are increasingly not replacing their devices.