Originally Posted by SolipsismX
It is not ambiguous. Real estate clearly refers to the size of the display, usually refered to in area as noted by diagonal inches with a reference to aspect ratio.
Failure to click the link and see that many folks mean resolution when they say screen real estate does not mean that the evidence does not exist to prove you wrong.
Again, so your position is that a 15" MBP has the identical screen real estate of a MBPr?
If it ONLY means size then why not state it even more simply and directly? The "screen is smaller" or the "screen is bigger". Why would anyone state "screen real estate" if the ONLY meaning was size.
In UI screen real estate as always meant the amount of stuff you could put on a screen.
"Screen Real Estate and Resolution
Of the many limitations web designers must deal with screen real estate should be completely understood. Screen real estate refers to the space available to design in. This could be an arbitrary box, but that box might vary depending on the size and resolution of users' computer display. Screen resolution varies from computer to computer, though it can be predicted in part by the age of the computer. Newer computers typically provide the standard screen resolution or higher. Older computers may have much lower resolutions.
The amount of screen real estate a given user may have can vary from 800 pixels wide by 600 pixels high (800x600) to 1024 pixels wide by 768 pixels high (1024x768), to 1400 pixels wide by 1050 pixels high, and beyond. Here are some examples of users I know and their screen resolutions:"
"It respects the device’s orientation by placing three, big interface elements next to each other; it doesn’t waste a single pixel of screen real estate;"
"This is partially how Apple handled the difference in resolution from iPhone to iPad—a lot of UI elements are the same pixel size, but padded to make use of the extra screen real estate."
"The highest resolution means you can read two articles side-by-side more easily or have any number of different windows open at the same time. Anyone who uses multiple monitors understands how much more productive extra screen real estate like this can be. The MacBook Pro Retina gives you that extra room.
The Lenovo T530 can be upgraded to a 1,920 by 1,200 resolution screen for a starting price of about $1,300. You'd have to add more to match the MacBook Pro's processor; there's no large solid-state drive option, and you won't get Retina display quality. But if you were mainly interested in more screen real estate, it seems worth a look."
I can go on but even ONE example of people using "screen real estate" to refer to resolution rather than size disproves any assertion that the ONLY meaning is size.