Of course. But considering things I do not consider essential is like saying "yes" to "you save $1 when buying 5 apples, we charge for 4" when you only wanted one in the first place. The OP wrote about the specific "sw dev" group, not the average user. (e.g.: If I could downgrade the resolution of the displays for a significant discount, apple hw would be much more tempting to me - after all, 99% of the time I spend on computers I look at monospace fonts in emacs...)

I feel like text is where the retina screens really pay off. I'm not even sure if I could notice the difference looking at photos. But a good font on a retina display is something I still notice, even after having used it for 2 years+.