> That's because they're intended to work as media consumption devices rather than productivity ones. If someone feels productive on a phone, he or she has very likely adapted herself to the device than the other way around.

What are you talking about? Literally millions of people use their phones to create every day. They take pictures and post on Instagram, create videos with apps like Clips, iMovie, SnapChat, make music with GarageBand, and yes, also consume video. But iPhones are every bit intended to be creation devices as much as desktops. The form factor lends itself to a different type of content creation, but it's stellar at letting users create in addition to consume.