The ability to create a png with a .tic cartridge embedded and the game's f7 cover image displayed (and also subsequently easily being able to load it) would be extremely useful.
A png image is much easier to share than a .tic file as nearly every website accepts .pngs (provided no compression is done) with very few accepting indeterminate file types.
It also adds a visual element helping tic cartridges naturally stand out on webpages and in filesystem thumbnails and being able to easily distinguish between them.

Several similar fantasy consoles also have this feature and it is a very popular way to share creations.