I'd be surprised if we didn't see this in the next six or seven years the way things are moving now.
Optical discs with 1 TB capacity were first demonstrated in like 2004 or 2005, and now they are talking about 3.9 TB with HVD using the same "holographic" storage technology.
As far as the original question though, no you could never 100%, let alone better, replicate film through electronic means, no matter if its analog or digital. Its simply not possible; the process of converting it into electronic signals means you can never get it in a pure form.
I'm talking about equalling or bettering the quality of a 35mm film print (see thread title and OP). A film print already has a degree of loss compared to the original negatives; so all that would need to be done is to equal or reduce that amount of loss for an optical disc format; and you can equal or exceed the quality of a film print. It is certainly possible in theory.