Just bought a Chromebook Pixel. Love the hardware - Chromebooks in general are a great way to get a Linux laptop with guaranteed driver support.

But why is it still so hard to get decent HiDPI support in Linux (or for that matter Windows) desktop environments?

I realise Apple had an advantage in using vector-based Display Postscript, but massively divergent screen sizes and resolutions have been around for YEARS now, so why is it still such a faff?