I think we ARE in the beginning stages of the "post-PC" era, which doesn't mean PCs are dead, just dying. The Wintel duopoly is fading. If you want to call tablets a PC with a different form factor I think you're missing the bigger picture. Sure they're all just computing devices of one sort or another but we are witnessing a sea change of hardware and software as well as form factor. One where fast growing Asian markets, not the US market, will ultimately decide the winners and loosers.
I'm actually surprised that the average number of connected devices is only 5.7 per household.
Throw some young people into the mix -- my kids & their friends -- and between all the smartphones, a couple tablets, my desktop PCs, gaming consoles and Blu-ray players, at any giving moment I seem to have a disturbing number of clients connected to my WiFi router!
Bert - I totally agree. This is no more a "post-PC" era, than were the years that laptops were becoming popular or towers overtook horizontal cases. Tablets are a pretty amazing advance, but they're are a) something different or b) just another PC in a different form factor.
There may be a post-pc era at some point, but that point isn't now.
This article only underscores the meaninglessness of the "post-PC world" mantra. When PCs are present in 93 percent of connected homes, just how much growth can one expect? I'll bet a lot of these connected homes already have more than one PC in them. What you expect, at this level of coverage, is replacements and upgrades only.
When smartphones reach a number in that 90 percent neighborhood, would anyone expect their growth to be so high as to perpetuate the current hype about them?