Hi Scott,
I think this has been discussed in the past, but with the addition of color tile sets, all sorts of research is now practical. Backcountry campsite surveys come to mind, in keeping with my interests. It would be very desirable to know the date when a tile image was taken, say by right click over an exact area of interest.
I'm not sure if this is possible (if the tiles have this info) but it would be a great feature I think.
Larry