A interesting idea....i think so.

So when i am viewing files in both windows and mac, i always want to know how much hard drive space a certain folder is using. and if it is viewed in details setting you can see date modified, type, and size. but i always want to know like a percentage of hard drive space used. so i was thinking it would be cool to see a percentage. and well i think that since vista and leopard are really GUI pretty they could incorporate a little picture of it. maybe in the future.