I’ve been keeping half an eye on popovers and anchor positioning. I see the latter as a requirement for the former though, so I’ve been waiting not just for browser support, but also, for a deeper dive into how to apply these in the real world.
Ryan’s here with exactly what I was looking for. This is a fantastic article with loads of useful demos and code samples. All we have to do now is wait a bit for browsers to catch up because this stuff is hard to progressively enhance, as I see it.