[crazygringo]

Interesting. So it converts all vector graphics to a background image per page, but keeps all text as browser-rendered on top of it.

I guess I don't really see much practical purpose for it -- most browsers these days seem perfectly fine opening PDF files natively, after all. But it's a very cool technological demonstration.

Maybe this could be some kind of bridge tool for generating sites with fancy typographical layout? You could use Adobe Illustrator etc. to do fancy column work, drop caps, hyphenation, all that jazz -- and then "render" into HTML. It would certainly be as anti-"responsive" as you can get, but it would certainly have the ability to generate more advanced typography much faster than you can produce with HTML/CSS by hand.

[train_robber]

It definitely has a few practical purposes. I have used this for a website for a small magazine. Their issue was that they didn't have resources to design for the web. This was a good solution, wherein they just needed to upload a PDF once an issue was out. And this provides a bit more flexibility from other PDF viewers - organize by articles, add social sharing, commenting per page/article etc. etc.

[altrego99]

As a practical purpose, how about being able to edit a PDF document? I understand that it can be done through some other tools, but this is one more - and would be free and easy.

Convert to HTML -> Edit -> Print back to PDF (if needed)

[StavrosK]

I'm not sure the html will be clean enough to edit, sadly...

[coolwanglu]

It's for embedding, when you want to control the document or access the content.

Say you have a resume written in LaTeX and you want to insert Google Analytics inside?