lianlua: I gotta disagree with you on one point. My MBP17 was the coolest running laptop I've ever had.
I get what you're saying about having a greater area with the cooling system farther from the areas commonly touched, so the old 17" may seem cooler to the touch compared to the equivalent old 15" model, but they're also both hotter than current models. With much less heat generated in the first place with the newer computer, I couldn't say how much of a difference it would make.
You're comparing an Arrandale i7 at 17.5W/core with an Ivy Bridge i7 at 11.25W/core and much higher efficiency. Under the same load, the rMBP is going to generate substantially less heat to transfer in the first place. That at least mostly offsets the advantage of a bigger footprint.
Wow dude. Information overload. The point is that when Retina optimized resolutions are used it doesn't make everything, including text, microscopic. That's what the OP wanted to know.
Actually, the point was that 1920x1200 isn't a "retina optimized" mode at all. The text doesn't "look like" 1920x1200--it
is scaled to 1920x1200 along with everything else on the computer, regardless of whether a particular application has retina support. There is no retina support needed or even currently available at 1920x1200 (that would apply to a nonexistent 3840x2400-equipped Mac). Retina assets in application bundles are
not used when running at 1920x1200.
The retina/HiDPI feature you describe only applies for the default 1440x900 work area.
Indeed, but I don't mind a little math every now and again.
I do appreciate knowing that the text on the 15" in 1920x1200 is literally less than 10% smaller than it would be on my old 17". I'll still have to see it with my own eyes to know whether that's acceptable for me, but I suspect it will be.
I suspect that'll be the case, too.
But if you want to compare size, since there are no 17" models in stores, you can print the left or right half of a 1920x1200 screen shot at 9.0" tall and 7.2" wide, giving you a life-size printout of the 17" MBP that fits on a single sheet of paper. Lay that on top of the store display and see if you care about the difference.
Alternatively, when looking at the 15" rMBP, imagine the screen expanded to include the black bezel inside the rubber frame. That's actually pretty close to the size of the 17" panel in comparison.
The reason 15" to 17" has felt like a big jump in the past is because you got
both more pixels and more space. Now that only one of those is true, it doesn't feel that different.