I wish there was a good web-based alternative to PDF.
And a fairly universal converter to turn that markup language into a document.
Then we could use our pre-existing template systems that we use for all the HTML for PDFs and get rid of all these crazy systems that enterprises used to build all the PDF reports
You need something with constructs that can express pages, repeated tables, headers and footers, stuff like that in a much more native format.
So my point is, why create a new format when you can enhance HTML and CSS?