RubyMotions looks even uglier for me. It's just like someone stripped all the beauty of Ruby with libraries that weren't meant to pair with it.
However, I haven't made my mind yet about RubyMotion. There are some propositions for it and some against and a lot has to come in the next weeks. Let's see what will happen.
Note: I have been coding in Objective-C for two years and in Ruby for 1-2 months.