It's an adapter that you can build up yourself so that you can launch games on your Mister/TapTo device via a floppy disc. There are definitely dozens of us that wanted this!
So I remember this Asian kid I used to go to school with. He had an snes with an attachment on top that took floppy disks. He showed me some overseas games on it. I have no idea what that thing was but that's what this reminded me of
It would be great if it would interface the disk drive to the cores, but this is not loading the game from a disk but using the disk drive to tell the MiSTer which core and game to start from its regular storage.
What is next? Starting a game with a rotary phone? In the end it is again and again the same tapto gimmick, with another device emulating the NFC reader.