Neven emphasizes in his article that:
“...it is simply not possible to create excellent, detailed icons which can be
arbitrarily scaled to very small dimensions while preserving clarity. Small
icons are caricatures: they exaggerate some features, drop others and
align shapes to a sharp grid. Even if all icons could be executed as vectors,
the largest size would never scale down well.”Although here he is talking exclusively about icons, his description is apt for
most UI elements. The decisions involved in scaling are creative, not
mechanical. Vector-based elements aren’t suitable for all resolutions, if you
value quality.