One can not have enough screen "real-estate" when working with photos, or while exploring your web-development skillz. So, a single display is simply not an option in my case......
Next to my 27" iMac stands a Dell 24" TFT Display. This Dell display is being abused for two things;
- extended display for my iMac, and
- as a main monitor for my (Windows) work laptop
using the input selector on the TFT display.
Since I'm a guy and I rock at multitasking (*cough*), I have both my Windows (work) laptop and my iMac powered on. In this scenario I have only one active display on my iMac. The second display should therefor not be used, and this is where Apple fails miserably.