As an expert in this area, my opinion is that silicon
sensors have a
long
ways to catch up to film. Both CCD and CMOS sensors
lack in
resolution
and the spatial sampling artifacts Der Mouse mentioned
are only part
of
the problem.
Another part of the problem is archiving the images. Decay of film/paper
photography is well known and incredibly slow(esp. B&W). Digital bitrot
is much faster and not well known. Just ask anyone who's lost a hard
disk drive full of digital baby pictures. I've also seen a lot of
discussion about CD-ROM and DVD-ROM lifespan and it's not good either.