4k wouldnt save 3d. 3d just plain sucked, as quantum said having to sit at a ertian angle ruined the experience.
Fax will frankly never die, as no digital replacements are 100% compliant and most corporate printers can do faxing.
I've been in the copier/printer business for 41 years. We sell more fax machines now, than we did 20 years ago. Today, they either come with a printer, or are added. And, with the larger copy machine, it's just an add in module. We are JUST starting to see the move to e-fax, which is server based.
One of the hospitals I served, had over 300 faxes. Either stand alone, or, built into their copiers/printers. When VoIp pretty much replaced copper wires for phones, it was a nightmare getting the analog fax machines, to work over the digital VoIp lines. The first gen ATA boxes didn't have the buffer space, to handle the "high speed" (G3/Super G3 33.6k) so we had to slow them down to 9.6k. Once later ATA boxes came out, some will work at 33.6k, but most won't work over 14.4k, which is where we go on a new one, if the 33.6k doesn't work.
I asked the communication guy why they stuck with faxing (mostly prescription orders for clinics and drug stores) He said they couldn't "guarantee" email outside of their network. I got to thinking and he was spot on. If you type an email address incorrectly, it is possible it might actually GO somewhere, which would be a HIPPA problem. What would the odds be, you dialed a fax number incorrectly, and it actually went to a fax machine?
I hope the d*mn things die off! They are a slow PITA technology (analog) that was techincally developed in the 1800's. AT&T came up with a good version in the 1920's.
If you watch old movies, you'll hear something about someone sending an AP "wire photo" which was basically a fax.
The worst part is the general public. We get calls saying "fix your fax" when it can send to 999 fax numbers, but not 1 fax, so, it must be YOUR fax causing the problem.
Sorry for the rant...the d&mn things have given me gray hair!