Tablet vs laptop/desktop
I've seen few "ordinary" people purchase a fondleslab as the tool they intend to do creative work on or as a productivity tool. The majority use theirs to consume content. Fondleslabs exist *primarily* for that purpose. Fondleslabs consume content but _can_ be used for creative/productivity tasks, just not as conveniently. Desktops and laptops, on the other hand, are first and foremost creation/productivity platforms but _can_ consume content, just not as conveniently.
Though the purposes are not in opposition, they are far from the same thing. As long as it provides a convenient and easy way to fulfill its purpose, each platform will succeed in its own space. Artists, musicians and writers have always been only a small percentage of the population and I see nothing in society or evolution that has changed that fact.
The general market doesn't give a shit what's running under the hood, only how convenient to use the UI is. Since the UI on *nix is just another process running on the core, it is only the perceived lack of a convenient and easy UI that keeps "Linux" (per se) off the fondleslab (Android notwithstanding) and that can be remedied by "somebody else" at any time.