As has been pointed out in the replies about 30 times already, PostPC doesn't mean the PC is dead, it only means that the PC market is mature and innovation slows way down as everyone focuses on newer more dynamic markets. The fact that people feel no need to upgrade their PCs anymore yet they are still rushing out to buy the new iPad is symptomatic of that. Surely I'll buy a new PC in the future to replace my old one, but I don't expect my sister or dad to do the same.
I once had a workmate in 1999 whose sentiment was similar to your post, just focusing on a different device. We got into an argument about whether the desktop PC market was over or not. He didn't really believe that laptops were really more than niche devices, they were too slow, displays were too small, that most people would use desktop PCs for decades to come. That you could never do more than surf the web on it, you couldn't hack serious code with it.
That tablets are for consumption only...really? Diagramming (e.g., OmniGraffle), vector graphic production, sketching, mixing and producing music, editing images, updating a spreadsheet...why not? Many are using tablets for production already. Every year someone says iPad can't do X, the next year someone releases something that does X and it actually doesn't suck.
I often use my iPad 2 in bed (~1 foot distance), the screen is really close and I can see the pixels. The new iPad is absolutely frigging amazing, I'll never look at my crappy DELL/HP monitors at work in a positive way again (yes, I can see the pixels!). Why have we been stuck at the same crappy 1920x1200 pixel resolution for at least 5 years now? Could it be that no one care about innovating in the PC market because they can't make any money? That a 10" iPad has a higher resolution than my 24" PC monitor is totally Post PC.
Simply wait ;-) probably with age your sight will decrease and at one point you simply will stop to see difference.
I guess that 70% or more of people in theirs 30's will have problem with seeing difference (except brighter colors). Of course in one or two years everything will have screens with more pixels, but from some point it will be always only marketing thing.
As for now if you look on 22 cm long screen with resolution 1280 pixels for width, and you keep screen in 0.5 m distance it means that one pixel have size of 1.17 minute, so some, and maybe even most of people aren't able to distinguish single pixels.
Some people are using tablets for work, some are doing the same on phones, but for many computers are much more comfortable. It is very personal thing, for me tablet is cool for playing in some addictive games like Cut the Rope or Where's my water? but I will kill anybody who will propose to change my computer which I'm using for development for any tablet. The same, after reading several books on tablet I much more like reading on Kindle, it hasn't this ugly glossy screen when I can see me instead of text ;-)
Higher PPI is more important, not less, as your eyesight degrades. Turns out pixelation is bad for your eyes. The advantage to having a higher PPI is that things are clearer, not smaller as some windows aficionados have come to expect.
Nobody is significantly investing in desktop pc display technology right now as far as I know, not samsung or LG, it's very stagnate. That's the point, PC R&D seems as good as dead. It's a big shame, I would really love a decent display for my workstation.
I once had a workmate in 1999 whose sentiment was similar to your post, just focusing on a different device. We got into an argument about whether the desktop PC market was over or not. He didn't really believe that laptops were really more than niche devices, they were too slow, displays were too small, that most people would use desktop PCs for decades to come. That you could never do more than surf the web on it, you couldn't hack serious code with it.
That tablets are for consumption only...really? Diagramming (e.g., OmniGraffle), vector graphic production, sketching, mixing and producing music, editing images, updating a spreadsheet...why not? Many are using tablets for production already. Every year someone says iPad can't do X, the next year someone releases something that does X and it actually doesn't suck.
I often use my iPad 2 in bed (~1 foot distance), the screen is really close and I can see the pixels. The new iPad is absolutely frigging amazing, I'll never look at my crappy DELL/HP monitors at work in a positive way again (yes, I can see the pixels!). Why have we been stuck at the same crappy 1920x1200 pixel resolution for at least 5 years now? Could it be that no one care about innovating in the PC market because they can't make any money? That a 10" iPad has a higher resolution than my 24" PC monitor is totally Post PC.