When working from home, I've started plugging my PowerBook into the 19-inch monitor, Apple Pro Keyboard, and Logitech Wheel Mouse that I normally have attached to my blue & white G3. Wow, is it nice. Even if the graphics are slighly sluggish (16MB ATI RADEON Mobility), it's damn nice to be able to code on a 1600 by 1200 display, especially at 85Hz refresh. The only thing that could be nicer would be an Apple Cinema Display HD, or maybe one of those giant 200dpi displays from IBM.
I should try my monitor at 1792 by 1334 at 75Hz at some point. It's a Sony CPD-G400, which can supposedly do up to 1800 by 1440. But I suspect 1600 by 1200 at 85Hz is the sweet spot, where even 9-point Monaco text is perfectly legible.
This is almost as effective as caffeine for helping me crank out code like mad, especially since I finally put ProjectBuilder into "many windows" mode once and for all. Now my principal development environment looks and feels like a real IDE rather than a clone of that Microsoft Visual Studio garbage everybody seems to think IDEs should be like these days...
And there's the fact that Apple needs to do something about system fonts at higher resolution.