I think the author's primary complaint was that it wasn't worth the premium; if you've already bought it, haven't you already made that decision?
Yes, it's not completely smooth scrolling The Verge (something that, as a Verge reader, I didn't even notice until it was pointed out), but personally I'd rather have that amazing screen for looking at text and photos and watching videos instead of having 60fps scrolling on a 1440x900 screen.
Sure, I was just picking a few generic examples, but there's lots of "pro" stuff that doesn't need a super beefy GPU - developing software, editing audio and images, etc.
Scrolling issues seem more like a software issue, sure there are a lot of pixels to move around but the retina stuff is pretty new. I doubt that the software is at the limit of what the hardware can do.
Yes, it's not completely smooth scrolling The Verge (something that, as a Verge reader, I didn't even notice until it was pointed out), but personally I'd rather have that amazing screen for looking at text and photos and watching videos instead of having 60fps scrolling on a 1440x900 screen.