The irony of his essay really hit home after watching the first few minutes the Alex Faaborg video he linked to. Alex uses an interview with jwz to introduce the philosophical foundation that Mozilla is built one. Times sure have changed.
I thought Jamie's essay was pretty reasonable. It highlights the open vs. closed debate that's been going on for decades. I doubt that open systems will ever be able to provide the end-to-end consistency and integration that an Apple-style walled garden can provide (if done right). You have to decide what's more important to you.