I am trying to figure out why don't Gruber himself listen to his own advice and develop iPhone/iPad app already.<p>I mean, writing good technical reviews and opinions about iOS is a very nice thing. But give advise to mass developers should be done from experience, rather than theory.<p>As for the advice itself, it is right that in five years from now, mobile devices will be all over the place and today's sales volumes are just the iceberg's tip, yet, a developer should think about the opportunity of "mobile-computing" rather than a particular "mobile device". For me, it is a web developer who decide his web apps are to be working with chrome browsers only, since the number of chrome installations today is nothing comparing to what it will be in 5 years from now, and simply ignoring safari, firefox (and even ie, oops).