My gut instinct is to agree with every bit of that. I admit that I might be missing something, but I've never wanted to send the data once and then have the client view it in multiple transformed ways (minus simple presentation stuff like sorting a table by column and things like that).

And using it to generate RSS as mentioned elsewhere in the comments? That makes perfect sense to me on the server. I don't know that I've ever even seen client-side generated RSS.

But again, this may all be my own lack of imagination.