Craig Mod has an excellent post about digital publishing, inspired in part by Marco Arment’s new iOS-exclusive publication The Magazine.  He writes:

In product design, the simplest thought exercise is to make additions. It’s the easiest way to make an Old Thing feel like a New Thing. The more difficult exercise is to reconsider the product in the context of now. A now which may be very different from the then in which the product was originally conceived.