I'd say there is a zero percent chance of this ever happening :D
The original Apple TV was an Intel Core Solo with 256 MB of RAM and an nVidia GPU, running a modified Mac OS X 10.4 that booted into something similar to Front Row instead of Finder.
As far as I recall, none of the USB drives of the iMac era could read 400/800K GCR disks, they were PC drives that could only use 720/1440K disks. The Imation SuperDisk drives could also use their own 120MB “floptical” disis. Later versions extended it to 240MB, and could also write 32MB to a standard floppy disk.
MFS refers to the file system used on 400K disks. 800K disks used HFS.
I learned Objective-C and Cocoa in the days of manual reference counting. I use Swift for new personal projects, I don’t plan to rewrite the old ones in Swift for no reason, but I may add new features in Swift even if not strictly necessary.