%- page_class = class_name.sub(/./) { |a| a.downcase } + "Page" %>
Templates in rio are as simple as html but introduce powerful components that allow you to quickly build desktop like apps that bind data to and from your rails server.
Models in rio work a lot like they do in rails. One difference is that they introduce realtime client-server bindings. Check out this writeup for more details.
One of the most compelling features of rio is real-time collaboration. You get it for free!
There are way too many features of rio to enumerate here. Have fun!