Basic high DPI support (#555) will make us quite usable and nice-looking on high DPI displays, but it won't do anything to fix our icons, which will stay at the same, fixed size.
Probably easiest to do by converting our icons to SVG and using wx.svg, but that of course means refactoring our image handling first to make something like that feasible.

Blockers:

• High DPI Support #555
• De-wx'ing #190

Under #366

See also our [dev] High DPI wiki page.