“Interface fragmentation seems to be a somewhat desirable thing. Okay, let’s call it “interface uniqueness.” You set the look of the product to reflect (or create) a brand feel that is related to the device it lives on, but is clearly differentiated from other apps or sites available to the same device. This is valid, and we work on projects like that all the time. Right this minute I have a team working on new interfaces for a mobile web browser. But interaction has to be grounded in the common device interaction language. We’re not changing the interaction for that browser in any notable way.”

Link: Interaction fragmentation, and avoiding it (littlespringsdesign.com)