A couple more reasons
@Andrew. You have 8 good reasons for the rebirth of the PC. I'll suggest two more reasons to bring it to a nice, even 10.
9. Ergonomics. I love the convenience that comes with the computing power of a phone or even a notebook. You can access data from more places faster than ever. However, I don't want to do any significant typing or working with apps like Excel on a phone or phablet. Doing "desktop style" work on a mini-device is slower and often more painful (hands, back, eyes). Plus, there are factors such as scrolling across and swiping just to see a viewable image.
10.Product life. The days of turning over a PC inventory every two or three years are long gone. That cycle was rooted in 20 years of Microsoft and other software vendors rolling out "enhancements" on a regular schedule. Each version was fatter than the other, and of course releasing a new version of Windows meant releasing new versions of Office or Lotus or any other app. Fatter apps called for more memory, more storage, and greater processor speed (Intel was fine with that). With today's PCs you can have your apps in the cloud or at the desktop, and you have the same option for your data. So, a company or an individual won't have to spend $2,000 to $4,000 every two or three years just to keep pace with the software sector. Maybe we can stretch future PCs into a 5-year or even 10-year lifecycle. How many phones and tablets might last 5 years?