Hard to tell what the heck is this. What is rubymotion? What is this distribution ('cause I doubt it's a totally new operating system) for? What are the assumpt

Hard to tell what the heck is this. What is rubymotion? What is this distribution ('cause I doubt it's a totally new operating system) for? What are the assumptions? All I get on a landing page is some information about what changed compared to previous release. I don't know what the previous release was like, so I can't compare.