Before apple moves onto higher retina display monitors, they should first focus on one thing and one thing only... trying to get all their product line consistent with the same DPI.
It's really annoying when you have so many different weird resolutions, but more so, ppi ranges. (pixels per inch)
the 17" MBP has a ppi of 133.
the 11.6" MBA has 135 ppi
the 13" MBA has 127 ppi
the 13" MBP has 113 ppi.
the 27" iMac has 109 ppi
the iphone has 329 ppi
the ipad has 131 ppi
Not only this, but apple have not 3, but 4 different aspect ratios for their products. 16:9 (iMac, 11.6" MBA) 16:10 (13/15/17" MBP) 16:12 (iPad) and 3:2 (iPhone)
I understand having 16:12 (4:3) on the iPad, but 16:9 for their macbooks and iMacs? Why have 16:9 if they already have 16:10 with the other half of their product line? And what is with the weird 3:2 iPhone aspect ratio? that is crazy! In my opinion of course. 16:9 is fine, but not for professional machines.
I know apple don't manufacture their own displays, but they must be able to find a way to fix this.
Here's an example of what I think they should do... remember, just an example.
iPhone 3.9" 960x600 - 290ppi (I HATE 3:2, it's not compatible with anything!)
iPad 10.4" 2560x1600 - 290ppi (or the same PPI but in 4:3 aspect ratio)
Macbook Air 11.7" - 1440x900 - 145ppi
Macbook Air/Pro 13.0" - 1600x1000 - 145ppi
Macbook Pro 15.6" 1920x1200 - 145ppi
iMac 20.8" 2560x1600 - 145ppi
iMac 31.2" 3840x2400 - 145ppi
They could then introduce resolution independency. e.g. 15.6" MBP 1920x1200 you can downsize the theoretical resolution of the display to 1760x1100, 1600x1000, 1440x900, 1280x800 etc...
Thus, making everything larger, without losing resolution, in case you can't read text so small or don't need so much screen real estate.
So you could have a 31.2" iMac (or cinema display) with 3840x2400. If you sit about 2 feet from the screen and can't read the text at the native (virtual) 3840x2400 resolution, you could then adjust the virtual resolution to something around the same size as 2560x1600, giving you less real estate, but easier to read text etc... Then, if you decide to move the screen closer to your face, you could adjust the virtual resolution to 3200x2000, giving you more real estate, but not straining your eyes so much since the display is closer.
Funny, I have pretty much described Resolution Independency itself, but nethertheless, my one wish is to have a 15" 1920x1200 MBP and a 3840x2400 30" iMac. Though, I think anything more than 150ppi for a notebook/desktop display is a waste of pixels, unless you are going to be only 6 inches from the screen. And if you do that you are probably in a very uncomfortable and dangerous (for your spine) seating position anyway. 3840x2400 on a 15" screen is a waste of precious GPU power. And we all know how outdated the GPU's are that apple ships in their Macbooks and iMacs.
I need to do more research on this, but I am sure 150ppi is the max you would want for a notebook/desktop. Go into any tech store and try find a Sony Vaio Z. There is a 13.1" model with a 1920x1080 display at 168ppi. Sit about 9 inches from the screen and tell me if you see a single pixel.
Just my 2 cents...
