Comment 30 for bug 564072

Since this bug is labeled as gtk+2.0, I'd be interested to see also work continued on the gtk+2.0 toolkit.

By manually editing gtk+2.0 themes, one can at least double some elements' dimensions and it seems not to break the layout of applications (of course such a theme derivative is then specifically targeted for dpi). So there is definitely something that can be achieved by default, and at a lower level (in the theme engine or even toolkit).

Gtk+2.0 is far from disappearing (with distributions pertinaciously sticking to it, as well as all non-native toolkits like java, qt, vcl, xul basing there themes on it) and users will have to deal with it for years. Because of that, better dpi support —be it only partial— is wishable.