The only difference is that WP Metro looks better imho, but flat has real limitations down the road. I can't see how people will adapt their logos/apps/icons to

The only difference is that WP Metro looks better imho, but flat has real limitations down the road. I can't see how people will adapt their logos/apps/icons to fully comply with the flat trend - i think it's impossible and you'll end up with a messy mishmash of styles.