I wonder if this might be a nice bridge between the two? Imagine if you could snap a few photos, add your custom edits, and then see those images as available via your desktop app? In that way you could easily add more context and a more robust story around the images than what you can do currently in a mobile device.
Why? Because as great as mobile (and tablet) devices are there is still no substitute for a real desktop publishing experience. A keyboard is so essential for full-bodied writing that I couldn’t imagine storytelling without it.
Sure, you can attach a keyboard to your mobile device via Bluetooth (or directly) but I still need corollary apps to make it all work together. I still believe in the desktop app.