Umm, which work software? Programs like Word and Excel benefit from the extra real-estate.
Hmm... Visual Studio, Microsoft Business Solutions, Various imaging software, various 3D applications, Web design (where you also feel the lack of intensive colours/colour correctness), plenty of stuff that makes more sense to work with in "portrait" rather than "landscape" orientation really
@ "Cantousent": By all means, go for the best picture quality. Preferably, you could see a reseller where they have them lined up for comparison. A word of caution though if you do that. Sometimes, they deliberately manipulate image quality in order to sell a certain make a model (actually, that was a warning from my little brother who works for reseller).
You don't have to buy from that reseller, just do some window shopping and then buy the one you like where you get it the cheapest