Well, I'm not saying that's impossible. Retina displays should have come a long time ago. It's the first real development I see in displays in a long time.
As I already said in another post, I remember when I bought my first computer. It was 1993 and it was a PC desktop. It then run with a 386 DX processor at 33 MHz, 4 MB RAM, a 120 MB HD and a 1024x768 monitor.
Now, fast forward to the present, almost twenty years later. I can go to any store and buy a standard laptop with a dual-core, hyperthreaded, low-voltage CPU running at 2.5 GHz or even more, with 1.4 billion transistors (as opposed to the 275,000 transistors of the 386). The laptop will also have a standard 4 GB of RAM (1,000 more times than my 386). It may have a 500 GB HD, or maybe a 128 GB SSD; but it will have at least 1,000 more storage space than my old computer in any case. Yes, computers have evolved a lot in the last two decades. But this very same laptop will most likely have a 1366x768 screen, which is the widescreen (16:9) version of the 1024x768 screen resolution I had back in 1993, which is something that seems pretty unacceptable to me. I just can't accept that video cards have not evolved enough to support screen resolutions that are much higher than the screen resolutions of the 1990s. Perhaps those video cards need some tweaking, some new drivers or so, but the raw power to display those resolutions has to the there...