Though I agree that multitasking is important, I don't think it defines what 'computers' are either. Moreover, I think it's borderline right-wing talk, when you prefer something just because it's the known and familiar standard/implementation. Yes, I can see that the -current- multitasking implementations on iOS and Android are incomplete, just like the rest of their features-set are compared to their desktop brethren; but those are obviously work in progress and they may even one day overtake the 'personal computing' space when they reach feature-parity with what we currently know as 'computers'.