Tablets already have their Movable Type. It's called... Movable Type. I understand that the current fad is to go back to native, from HTML5, but for very content-centric app (i.e. one designed to make text easy to read), it makes sense to write it as a webapp. You're not transferring massive amounts of data. You're not dealing with the same level of interactivity requirements as, say, a game. Your job is to display text in a clear, easy-to-read fashion. I think this is something that mobile browsers can already do quite well. There's no reason to reinvent the wheel with a native app, when we can build on Movable Type (or some other blogging platform) to make it more mobile friendly.