I can imagine it now: opening the app on my Android tablet and writing something down to add to this wonderful community. It'll be a much better experience for me (because I just love mobile).
There's also one advantage that will come from the deployment of Steemit apps: A more interactive feed. The mobile is just superior to web interface when it comes to reading and discovering information. Steemit will have a whole lot more activity and it'll be easier for people to discover good content with native iOS and Android apps.
They're coming some time this year, and I'm just dying to know when