I think the author is right. Good, consistent design with good ergonomics certainly makes work more pleasant and enjoyable.

And Yes. Yes. The difference that the 3px makes is incredible. So do get yourself that extra 26" IPS monitor with extra 1920 x 1200 pixels.

I will kindly warn you though, that I do have some reservations about mentioned 'Apple glossy pixels', as although I'm currently wasting time writing this on a pixel-perfect glossy MacBook Air, nothing frustrates me more as are the reflections on that perfect glossy mirror. Which I can see right now. Or the inconsistent <home>/<end>, <command>, <control>, <fn> keys, when I'm actually working [if you need to spend significant amounts of time jumping between Mac/Linux and working in a command line, you will understand]. Or inability to connect two monitors to a MacBook Pro. Or how slow is the GCC on the virtual machine on that MacBook Pro with puny 16Gb of RAM. So do take the advice of the designer, but also keep in mind that all that glitters is not necessarily gold.