So you think that client side JS web apps are 'the way to go'. What's wrong with server side MCV web applications?
How does Ember.js in the clients browser scale when you have a a lot of data that needs marshaling / unmarshaling or generally processing and moving around? Surely it's more performant to do this on the JVM on the server rather than relying on the clients computing power (or lack of). Ideally you wouldn't do a lot of data processing in the MVC part of an app anyway but it seems like you're telling me the whole web app needs to be client side?
How does Ember.js in the clients browser scale when you have a a lot of data that needs marshaling / unmarshaling or generally processing and moving around? Surely it's more performant to do this on the JVM on the server rather than relying on the clients computing power (or lack of). Ideally you wouldn't do a lot of data processing in the MVC part of an app anyway but it seems like you're telling me the whole web app needs to be client side?