I highly suspect the fill rate gains you get from using DirectComposition/Core Animation for scrolling/zooming *static* vector graphics in 2D completely outweigh any gains from any fancy GPU vector rendering algorithm you could come up with in practice.
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So you either have to show that you can generate new tiles faster and that this matters on static content, or that your quality improvements can beat trilinear filtering. Both are hard, especially if your technique has high setup time.
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I think instead of focusing on panning and zooming of static content, researchers would be better off focusing on known-problematic cases like complex PDFs where initial generation of the tiles is horribly slow today or on dynamic content, where tile caching isn't helpful.
End of conversation
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