Many SublimeText themes include @2x versions of their skins to support Apple's retina MacBooks. Unfortunately, SublimeText doesn't seem to use these higher-density assets on Linux. (I'm testing on a Chromebook Pixel with /usr/bin/X -dpi 239 in /etc/X11/xinit/xserverrc.)
There's a hacked version of the Soda theme that tries to accommodate for this, but it doesn't look crisp and is a bit buggy. (For instance, the tab titles are clipped off.)
I'd appreciate a setting to force Sublime Text to double all pixel measurements and use @2x icons, so Sublime can take full advantage of my Pixel's gorgeous display.