This is what my desktop looks like. i3bar stuff is scaled according to DPI, so it all works out. Next I shall show firefox and chromium side by side.
Chromium text is scaled (by 250%) while in firefox, everything is scaled 2,5x, I think. The interface stuff in Chromium is all over the place. Some pieces are really small while others are normal sized. You can't see in this screenshot, but the address bar in chromium is pretty hard to use because the suggestions overlap with eachother (apparently vertical spacing of the suggestions doesn't actually account for the actual height of the text.)
Chromium is supposed to get DPI scaling with Aura. It's not so bad since you're mostly reading text with browsers anyway. Some other applications are really hard to use, like Steam. Not that I do much with this laptop, anyway.