Swiftkey have been an excellent example of a company doing things right for a few years now. After launching their at the time unique keyboard on the Android Play Store they soon dominated their field, and have recently ported their prize winning keyboard application to IOS as well. Like most successful companies they are not resting on their laurels, they are now looking at diversifying into SMS.
The new app has just left alpha stage and is only available via an invite only beta programme so is very early in development. What is clear from the screenshots we have however is that the emphasis is very much on style. If they can repeat their success with the Swiftkey keyboard then Android is sure to have an SMS app that might pry you away from your current favourite.