"Post-PC" Affects Device Usage, Design, Sales, Activities, Purpose and Places

PC shipments in Western Europe totaled 13.6 million units in the third quarter of 2012, a 15.4 percent decline compared with the same period in 2011, according to Gartner.

"We've witnessed a decline across all PC segments this quarter in Western Europe," said Meike Escherich, principal analyst at Gartner. In the third quarter of 2012, mobile PC shipments declined 15.2 percent while desktop PC shipments decreased 15.7 percent. The professional and consumer PC markets declined 15.8 percent and 15 percent, respectively.

In the third quarter of 2012, the U.K. consumer PC market declined eight percent, while the professional PC market declined six percent. The mobile PC market declined three percent. The biggest problem was the desktop PC market, which fell 13 percent.

In the third quarter of 2012, the French consumer market decreased nearly eight percent due to low back-to-school sales. The French professional market declined 7.4 percent in the third quarter 2012. 

PC shipments in Germany dropped 19 percent compared with the same period in 2011. 

Germany mobile PC shipments declined 14 percent in the third quarter of 2012, while desktop volumes decreased 13 percent year over year. Consumer dropped 20 percent and professional PC demand declined 18 percent. 

So what does it all mean? Computing is shifting from stationary to ubiquitous. Instead of "sitting at a desk," starting and finishing a task, users increasingly start on one device and then finish on other devices, at other times, Forrester Research says. 

Ubiquitous computing also incorporates more "context," supplied by accelerometers, gyroscopes and geolocators. 

"Post PC" computing also often is more casual. Compared to use of a PC at work, post PC consumption is interstitial: people use computing appliances for short periods of time, in between something else they are doing. 

Use of computing appliances also is more often used on the couch and in bed, rather than at a desk or table. And physical interaction is physical (touch and swipe) rather than abstracted through the use of a keyboard and mouse. 

The biggest evolution is from computing as "work" to computing as entertainment or play.