I own a macbook pro 17" late 2011 which has a 1920×1200 display with a pixel density of 132 ppi. Yesterday I tried hooking up the display to an Apple Thunderbolt Display, and to my great disappointment a window, when split across the two screens, was larger in the external Apple display than on the internal screen, due to the difference in the pixel density. I own a 24" HD display, and there I also notice the same issue.
I've spent some time researching, and I haven't been able to identify a potential candidate screen that has a display with comparable pixel density, and finally, size.
I see that some have suggested (in other questions) to lower the resolution on the internal screen, but that is, in my opinion, defeating the purpose of purchasing such a laptop and I would never consider such an idea.
Who can suggest displays, by any manufacturer, make and model, that are a good match as an external display for my MBP? The only condition I pose is that the display's resolution should be greater than the Macbook Pro's internal display resolution, as I see no advantage in using a second smaller screen.