As I've said in the past here on HN, the key feature for this will be webassembly. When it becomes possible to easily compile a "custom" version of freetype and

As I've said in the past here on HN, the key feature for this will be webassembly. When it becomes possible to easily compile a "custom" version of freetype and do all the rendering into a canvas element, and send the entire "webapp" (really: document with ads) down in a binary blob, everybody that currently depends on advertising will switch to it.