I think you're wrong.
From this[1] great essay about mainframes:
> Ultimately, there are only two natural kinds of computers: embedded systems and mainframes.
And this is so true. People have moved from personal computers to laptops and are in the process of moving to phones[2]. Smart watches seem to be a promising device; we'll see if people can put enough functionality into them to obviate the need for a phone.
Of course, not all tasks are suitable to be done on a phone or a watch. But one way to think of VR is a desk setup with huge monitors that happens to be extremely portable. Of course the promise of VR is much greater than that, but that is a pretty important use case - a use case that would obviate the need for laptops and desktops for many if not most tasks.
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1. http://www.winestockwebdesign.com/Essays/Eternal_Mainframe.h...
2. This isn't to say that the shift has been complete at all. Many people, including me, continue to use a desktop setup. And laptop use is still quite strong. But the derivative is ultimately what matters.