I'm not entirely sold on icon fonts. They look good at large sizes, but as they get smaller they become blurry. I'll stick to creating pixel perfect icons at different sizes.
I'll agree that the sort of pixel perfection you're after at smaller sizes isn't quite there yet (although well-hinted icon fonts are getting pretty close).
However, I think the advantages of icon fonts (packaged as a single file, automatically scalable, automatically retina-ready, colour-adaptive) are pretty compelling.
