The techniques you're describing aren't benefits of your system. They're just modern web programming techniques and certainly don't need to be used in a single page programming model.
For example the majority of what you're describing as benefits has been known to anyone using MVC for a while, MVC is available in any of the languages you mentioned as your system being easier than.
MVC was conceived to account for the limitations of a view oriented development philosophy. MVC is far from modern as it is not an evented model. Modern are platforms like Node.js and the RIA toolkits who eschew MVC in favor of an evented and message oriented architecture.
For example the majority of what you're describing as benefits has been known to anyone using MVC for a while, MVC is available in any of the languages you mentioned as your system being easier than.