Edit: The spartan design of Metro apps generally doesn't look that impressive in screenshots. The polish is more apparent in both the animations and UI elements (like the panorama view) which don't translate into static screens. This is the reason most WP7 ads feature "screen shots" that look like this: http://en.wikipedia.org/wiki/File:Wp7_musicvideo.jpg
Hopefully, Android goes the extra mile. It's getting better minus the crappy browser. Google has the best browser in the world. Why it's not on the phone is beyond me. Over the holidays a couple of my relatives had traded in their Android phones for iPhones. The details really do matter.
Have you ever used a WP7? It is very well polished. The parent you're replying only mentioned the polish is more clear when there's animations since that's a huge part of the design.