Devices which use these techniques aren't on the consumer market yet, but eventually they may be. The technology is improving. Not necessarily as much on the consumer end of the scale as it is on the high end of the scale, but it is improving. The problems right now are more in getting the technology affordable and reliable. The same is not true of digital media and digital files.
Digital media degrade with age.
Worse, storage standards, media standards, and file formats change almost daily. So what that means is if you put a CD-R full of digital images in your attic, and I put a bunch of photographic prints in mine, eighty years from now when our heirs go through all our old stuff, my images will still survive and yours will not. Many historians feel that the latter half of the 20th century will be one of the most poorly-documented times in all of human history. Fifty, sixty, seventy years from now, almost all of the current quadrillions of gigabytes of digital information which exist today will be gone, with no chance of recovery. There s nothing in the upper part of the histogram.