Stardock clearly have the technology to show the entire Start screen on the desktop, since that's how Start8 works if you set it to pop up a smaller version of the Win8 Start screen when clicking the Start button. Capturing an individual tile for display might be harder.... But yes, it would be nice.
We'd also have to have the ability to make a ModernUI window "stay on top" of other windows. It would be good to add this ability to ModernMix.