[matthewmacleod]

Completely disagree. Server-side and client side are two completely different environments — different architecture, different security concerns, different user interfaces. Indeed, there's pretty much nothing shared.

Attempts to hide this have thus far all been leaky abstractions, and we're still in the research phase (e.g. Meteor). I'm not convinced that it will be possible to create a coherent web environment which abstracts the server-client boundary effectively.

Note that this doesn't preclude e.g. using Javascript as a server-side language. That's not related.