How about this ......you listen to a broadcast, email a reception report and voila the broadcaster acknowledges your reception report by displaying a message for you on the receiver itself !!!
It happened during DX Antwerp, Belgian DX Club's special DRM broacast on the ocassion of their 30th anniversary last saturday, 12th May on 15775 kHz towards South Asia at 1530-1630 UTC.
Here's a video ...
Another innovation of DRM !!