The only thing staged about the demo is the richness of the widgets they already have available. Other than that, it's just like Objective-C + Interface Builde

The only thing staged about the demo is the richness of the widgets they already have available. Other than that, it's just like Objective-C + Interface Builder (or better; more dynamic, more portable, no compile/link/go slowdown). So you can expect generally the same amount of work to build stuff as you would expend building with Cocoa on the Mac/iPhone.