WPF went that route by using vector graphics everywhere. It has the nice property that it scales fine, but often you can see small one-pixel jumps of elements,

WPF went that route by using vector graphics everywhere. It has the nice property that it scales fine, but often you can see small one-pixel jumps of elements, e.g. the thumb in a scrollbar or on sliders. This wouldn't matter at all on a 300-dpi screen but with 96 dpi it's visible and sometimes jarring.