The company said its Worldwide Quarterly Personal Computing Device Tracker showed that growth would be driven by a rise in consumer interest, growth in popularity of competitive e-sports and new hardware from GPU companies.
Gaming PCs are defined as desktops or notebooks that have a premium of performance-grade GPU, including the mid-range and high-end Nvidia and AMD offerings. GPUs like the Quadro or Radeon Pro are excluded. Gaming monitors are defined as those have a refresh rate of 100Hz or more.
The company forecast that 15.5 million gaming desktops would be shipped globally in 2019, a year-on-year decline of 1.9%, though a rebound is expected next year. Newer games which use the latest graphics technologies like Ray Tracing and growth in game-related content creation are expected to drive this rebound.
"With game streaming on the horizon and the continued rise of mobile gaming, the PC gaming market will face new challenges but also opportunities," said Jitesh Ubrani, research manager for IDC's Mobile Device Trackers.
"There are plenty of reasons for optimism as issues around latency and bandwidth requirements will likely limit the success of gaming streaming services in the short term. And in contrast to mobile gaming, PC gaming has a larger library of so-called hardcore games, appealing to a different type of gamer."