DailyTech posted a story that Microsoft has tweaked the design of the Windows 8 desktop
While there's no real reason to doubt the authenticity of these shots, bear in mind that the leaked OS is a pre-RTM (release to manufacturing/marketing) build. Even the poster "canouna" warns, "Please keep in mind this is not the FINAL theme."Windows 8 Desktop's Metro UI Makeover Leaks
Some people have already (for better or worse) drawn comparisons between the Metro theme and the Windows XP Water Color theme
