- much faster (i.e. I don't need to wait for several TeX runs e.g. if I need to check if some tweak fixed my page breaking) On average true for manual composition, maybe false for automatic workflow
- optical (vs. metrical) kerning hz ? - a GUI ;-) and thus layout by "let's try how it looks" true - layout definition (I struggle with ConTeXt's \setuplayout every time) maybe
- better page breaking constraints (you can define in your style sheets "keep n lines together" and "keep this together with the next paragraph) maybe (hans/taco help needed here )
- PDF/X output - color profile conversions maybe. They can be after, in prepress , so can be sensate to keep separate this from tex.
- image processing features like crop paths, feathered edges, drop shadow (in ConTeXt I need to prepare such in Photoshop in the right size - but I guess it would be possible to write a module that uses ImageMagick to achieve something similar) maybe
-- luigi