I think the next logical step for Swift is Apple creates an iOS Swift IDE.
It doesn't need to be as complex as XCode. Its main purpose is to bring
Swift to the young generations who are mostly more familiar and fluent with
iOS rather than with OSX. At least bring Playground to the iOS.
For reference what the Swift IDE for iOS should be like, try to look at
Codea (Lua) and Pythonista (Python) app in the iOS app store. I love those
both apps. I believe Apple can do much better than those apps.
What do you think?