I found GLyphy a couple of years ago: https://github.com/behdad/glyphy (original finding was in this slashdot article). GLyphy is a text renderer that are using actual vectors submitted to the GPU instead of rendering to bitmaps. The benefit with doing the rendering with vectors is the superb quality of the rendered text, the disadvantage is a much higher runtime cost. However, maybe the cost is worth it at the time of this writing. Today we have virtual reality headsets for example. In virtual reality, low quality rendering of text might destroy the whole experience in a VR UI.
Well, it has been laying around in the back of my head for a long time and out of curiosity I started to look for serious projects using it in the wild. I did not find any bigger project using it ... sadness. In the end I added an request/issue to the Godot engine about them to start using GLyphy: github issue.
If anyone know about some project using GLyphy, please post a comment about it.