Yes, you can consider that. Intel won't bother to make a CPU exclusively for the gaming crowd, Microsoft also won't make a dedicated operational system for gaming... I think you can see the drill. The gaming market is important, but it's not strong enough to dictate trends to the entire industry.
Unless I missed something,there is no CPU made especially with certain workloads in mind.There is no special CPU for office work or for professional video editing either.What does that mean?People who type in MS Word are a niche?On the contrary,though,no GPUs are made with web browsing or document editing in mind.The vast majority of GPUs are targeted towards either gamers or professionals.
On the software side,aside from the fact that games are in large part responsible for Windows still surviving this long,and aside from the fact that DirectX (By Microsoft themselves) and the console OS's are software tailored to gaming especially,there is also SteamOS now,a whole OS made with gaming in mind.Will it take off or sink?We don't know.But it's there and Valve must have their reason for making it.They aren't a charity and,last time I checked,you need a large number of people to make enough money in such ventures.
What you are describing also applies to Ultrabooks or even convertibles. Unless you need a lot of CPU/GPU performance, a notebook with keyboard and monitor can fully replace your desktop *and* give you mobility when necessary. The only question left is whether mobility is worth paying for you.
The price one has to pay for mobility (Proper mobility,not these sorry excuses for a mobile device some gaming oriented laptops are) isn't only monetary,but also in performance.Yeah,decent laptops with modern CPUs and GPUs and SSDs and whatnot are fast enough for most tasks average Joe will throw at them.
Problem is,not everyone is average Joe.Even my sister,the most technologically ignorant human on this side of the planet,starts bitching when her laptop is slow and doesn't perform what she wants,how she wants.Don't forget that these people abuse their machines more than most.Yeah,we here that are (At least supposedly) more tech savvy than most people out there do tend to stress our machines (Heavy games and other software,a gazillion apps and browser tabs open etc) quite a lot.We,however,also know how to properly run diagnostics,cleaning utilities and we know enough to start at least closing stuff when there's just too much,among other things.That's not the case with average Joe (Why the heck is it even Joe anyway? ).Some people just don't know when to stop.
Saturation and maturity of the PC is,in my opinion,the primary reasons for slowing sales.I tend to believe those who say that PC sales will just balance somewhere and stay there for the foreseeable future.Tablets and portables aren't here to replace the PC.They're here to do what the PC can't.If anything,I think they complete it.Imagine if the synchronization of your smartphone,tablet,laptop and desktop was done properly.That way,your desktop is at home and is as powerful as it needs be,with everything you might ever need.Then,the other devices (Whichever you might choose) let you in some sense take your PC with you.If for example you could turn on your tablet and it synced your open browser tabs from your PC and then you had OTA access to your files and stuff like that,the tablet wouldn't replace the PC,it would just be a remote access portable computer of sorts.
Possibilities are endless if you come to think about it.Saying X will die or Y will dominate the market at this point is plain stupid.The trend may support portables,but don't forget that the trend for mobile devices (Phones,MP3 player,PDAs,PVPs etc and there was not even a thought of tablets) once was "Make it as small as possible" (Anyone remember the NeoNode N1?Ugly,useless POS...).Less than a decade later,it's all about being the biggest in something (No pun intended) and 10+" slates are considered mobile.
I say patience.Exciting times are ahead of us.