Honestly, how many times must I say it? Snow Leopard will be darker. After a lot of research, it seems I was the one of the first ones (if not the first one) to suggest that Snow Leopard’s interface will be darker:
Snow Leopard Obviously will be Darker
and now, QuickTime X (image from AppleInsider):
The image may be an artist’s rendition, but it’s based on reported facts, and what should stand out the most is the black title bar. Besides that, there’s also the new iMovie and GarageBand 09 interface elements other people have pointed out.