Oooh, another argument!
Better get my 2 cents in before this thread closes down as well. :devil:
The underlying assumption here is that the analog resolution of a slide is greater than the resolution of a digital image. This, as Jed says, is debatable. The day will come when your scanner will outperform the resolution of your slide image. It IS limited by the size of each individual crystal, you know.
Once a time scanner is already outperform our resolution of flim, due to cost, those machine no longer in production.
In any case, software interpolation techniques improve with time as well. Heard of Genuine Fractals? Something that was probably inconceivable a few years ago. Just as your slide can be better scanned in the future, a digital image CAN be digitally resampled. I never thought a 72dpi image could look so good on a monitor, but it does.
There were no more extra detail when resample, but it does looks good.
Nobody will live long enough to test the validity of this assertion. Your slide will most likely have crumbled to dust, together with the CD-R's. The difference is that the digital contents of a CD-R can be reproduced perfectly with great ease, on the medium of the day. The same is certainly not true of a slide. I have material which was originally stored on a 5 1/4 inch floppy, still available on my hard disk today, though one would be hard pressed to find a 5 1/4 inch floppy drive.