At the end of 2010, John Gruber of Daring Fireball wrote in a Macworld column,

The central conceit of the iPad is that it���s a portable computer that does less���and because it does less, what it does do, it does better, more simply, and more elegantly. Apple can only begin phasing out the Mac if and when iOS expands to allow us to do everything we can do on the Mac. It���s the heaviness of the Mac that allows iOS to remain light.

Back then he wrote that long-term (“say, ten years out”), iO...