Still number 1 and 2 need a filesystem. Yes the newer office tries to save to Ondrive by default but still. Even Joe Public does Turbotax and needs a real PDF saved and not gone tomorrow on his Android phone.
A good keyboard is good too.
PC gaming market is growing believe it or not according to a statistic by maximumpc.com. Basically the newer consoles are gimped with atom like cpus and a growing millennial generation. It is growing too as developers and video users do need real towers.
Also it is nice to have storage options to hook into cameras,phones, and external disks.
This is a fad like the netbooks. Not to say tablets will vanish, but rather they do not constitute a takeover. It is like the truck and SUV phase that started in the 1990s. Remember? Do we not have cars anymore? No we have both.
Pc users do not need to upgrade as much does not mean they do not use pcs anymore. Rather they have matured. Once the laws of physics hit cell phones in the next 5 years. Yes I said 5 YEARS TOP. People will no longer buy phones and tablets as what they have works.
If PC makers made great desktops perhaps I would buy them? Right now PSUs and motherboards have improved but not OEMs so I build my own for now. Yes I do recognize that as nich :-)
But the new pc will be Windows based if you need work done and will go from 9 inch atoms to requiring an external monitors to i7's.
The surface is really just a thin PC.