The world has largely established that http is the way to query devices and control them. Device drivers are the spawn of the devil to me and completely unnecessary (thank you Microsoft). They may very well be the pinnacle of what I'm complaining about.
Printers could have a free wireless web interface where you upload any file type from tiff to doc and it "just works." I realize it's more complicated than that because of colorspaces and half toning and blah blah blah. But it shouldn't be.
And I shouldn't need any special software to save images from my scanner or take a snapshot with my webcam. I actually wrote a command line tool on the Mac to tell Quicktime to save a snapshot from the webcam as a file. That is pathetic and makes me want to hit myself over the head with a sledgehammer.
I don't think I've said anything earth shattering here but wake me up when any of this happens.
We sort of had this before Windows. When you bought a printer you had to make sure it had an Epson FX mode to support Wordstar, Diablo 630 to print you invoices and IBM Proprinter to print your mainframe reports. It was a bloody mess.
The Windows printer driver model isn't great and MS appear to recognise this, but things were a lot harder when every application did it's own thing.
As for printers, PS was proposed as a standard so that printers "just worked". It cost money to license, not every jumped on board, and so it didn't establish itself as the dominant brand. PDF is based on PS and people could certainly standardize around it. The problems are the same as with PS, however.
Your screenshot example. I assure you that you are not the first person to think of this feature. Apple does distribute Photo Booth with OS X after all. Is your complain then that they didn't cater to an the incredible minority with a command line tool to do this? I don't see this as a reasonable complaint. It's certainly not something to hit yourself over the head with.
None of this has anything to do with computers nor state-of-the art. Your complaints seem to be that society is not catering to your specific needs quite enough. Or that people are not working together quite enough. While I agree with you on the later point, it's not worth getting so worked up over. It's always been this way and likely always will.
Also the only decent-performance chips doing it were from Adobe, and they weren't cheap. At the time, this would have pretty much cut the low-end printer market to the ground. The high-end printer market, of course, pretty much all did PostScript if you asked them to.