I'm wondering if anyone has done or is aware of any research on the use of smart-phones in portrait vs landscape orientation?
take a theory, that since portrait orientation is a natural "phone"
orientation, anyone who changes to landscape switches to a non-phone
If someone is using an app, switching orientation would be a proof
of an increased engagement and a form of commitment to use the device
as a platform for the app, not a phone.
If we think this is
true, the design of portrait and landscape UI may be very different;
not just the layout, but elements of UI. I.e. we may loose carrier bars
in landscape, but keep them in portrait.