+1 for the topic. I need to do a couple things that I think are along the same line:
1) I need to have a background, anchored to the bottom of the screen, where the image is scaled depending on the screen resolution, but the image aspect ratio needs to be preserved. If the width is too large for the image, the top of the image would get cut off screen. If the height is too large for the image, then then it would crop from the sides of the image.
2) I have a header bar that should take up the top 5 of the screen (that's easy enough with the new anchoring system). Then I need the logo inside of the title bar, which should be scaled to fit within the header bar, but not skew the image and mess up the logo.
Anyone have any ideas on how to do this with the new anchoring system?