I been reading comments on the above re photo technology, just upgraded my camera from a nikon d5000 to a nikon d600 with the kit lens which nikon sells a 24 85mm vr.
On a whim i got my sister to spot out a mixture of photos made from my old d5000 and d600, she got 8 out of 10 right. There is a marked improvement when upgrading to the current model, the d5000 had 12 megapixels the current d600 has 24 megapixels, not just megapixels but the sensor and the processor has been improved, so yes there are improvements.
In terms of hifi i been listening to hifi since i been a teenager, your hearing changes just like your eyes change due to age, certainly music has changed too, to digital, with more treble and bass.
However listening to music is a subjective opinion one cant say this is better, as some hear more analytical whilst some like to hear more natural its the way our hearing has been arranged, thus how the brain interprets the sound.
Now to formats lp, cassettes,cd, mp3 lossless minidisc, they are designed to be convenient, and cheap to manufacture and sell, one may prefer the sound of the original lp, as they have been mastered on a top end reel to reel taperecorder then cut.
As for digital sound, the original cds were mastered on audio reel to reel, that why some may swear that they sound great, and then you get some remastered originals where the music is shown all warts and all, as the digital equipment has been refined.
The problem with cds is that its fixed on to 16 bits 44khz so the frequency response goes from 20 to 20k, however it the bits we cant hear also affects out enjoyment, on turntables the cartridges frequency response is greater, going from 16 to 28khz or greater.
And you got then sacd, which attempt to address the limitations of cd by increasing the frequency response.
in terms of amplifiers, there are subtle improvements, the old jap amps didnt have dedicated circiuits to improve the sound, they had a characteristic sound, the european amps certainly the british ones where tuned to suit music that needed a wider range and to highlight subtelity and naunces in the music being replayed.
So you got two camps one mass market designed to appeal to all, another that is designed to appeal to the connosier of music