Good news and bad news in the same post. Short term effect of the Windows 10 release on July 29th is predicted to hurt sale this year, but by 2016 sales are expected to grown somewhat. And that dire prediction that smartphones and tablets would kill the PC market has not materialized.
The co-existence of multiple devices in many homes is still an important factor to consider. After all, these are "personal" devices rather than home appliances in most cases.
Gartner: Windows 10 to hurt PC sales this year - Business Insider
Thanks to Business Insider