Theories

As an electronic artist, I often faced the same fact with my creation, specially with videos: for example, the software I was using ages ago is not available anymore, and maybe my video resolution in 1998 was like 320 x 240 (very fine for those times)...

and now it haves to confront with streaming full hd content.

now 4K

And I cannot re-render it...

Digital art, is nothing much more than a connotation, almost mirror-like, of electronic art.

Quite simply, it indicates the art created on a computer, or that use, non-trivially, the computer to manipulate and edit an forms art piece.

Compared to electronic art, has a slightly narrower meaning, as it tends to indicate projects having an independent life directly inside of the PC.