Won't the increase in pixels put an increased strain on the GPU? Apple doesn't supply very powerful ones to begin with. I imagine if people want to do any 3D work it would maybe then cause performance issues?
I'm betting that the "Open in HIDPI" button in that screenshot will change to "Don't Open in HIDPI" in the final version.
Just like the "Open in 32 Bit" option, it'll be there for those who need it. Yeah, probably After Effects and Motion users will end up disabling it for those programs.
I believe the problem being referred to exists more with 3rd party displays rather than the Apple displays.
Perhaps, but I still think that's a great bit of knowledge for developers...that a 2013 Mac product will work the same, screen-wise, as a 2011 version of that same product.
Which is all I'm saying...that this is helpful info to have.