Hello,
To help with the High DPI problems with software, specially with toolbars or ribbons, one way would be to use SVG graphic format. It would be useful in a container type like TTMSFNCBitmapContainer and that would adjust size automatically if the scale of the resolution changes.
I like the Axialis icons packs a lot and I can create nice icons in SVG formats.
PS. I use FNC pack but it would also be cool for the VCL pack too.