Good Gear Guide
In Pictures: Leaked features in Windows 8.1 Update...
Make visual elements of the OS even bigger
Under the Display settings window, two more sizing presets will be available to your computer if it’s capable of displaying a resolution of at least 3200-by-1800 pixels: 250% and 500%. These ranges will further enlarge the size of text, icons and UI elements.
In Pictures: Leaked features in Windows 8.1 Update 1