1 Question: how do I know how many more pixels per square inch there will be on a Samsung 24" monitor compared to my existing LG L1915S?
2 I was thinking about the improvements it would offer. Yes, I will still have the same number of icons on my desktop vertically. But when I am using a spreadsheet for example, I presume that the sharper picture will enable me to see more cells vertically because I can zoon out and the sharper picture will let the small text still be visible, rather than blurred, right?
1 Pythagoras' theorem if you know it, otherwise you could just google a pixel per inch calculator
http://members.ping.de/~sven/dpi.html <-- first result for pixel per inch calculator
2 if you zoom out then the screen is trying to show things that are meant to take a certain number of pixels with less pixels, it would depend on the monitors scaler i think, otherwise it would be the same no matter which monitor you have (correct if i wrong someone)
You would however be able to see more horizontally or be able to have 2 instances of it open and place them side-by-side with one viewing (for example) down to row 20 and the either from 21-41
Also i have found that with the recent flood of widescreen monitors that toolbars a lot more suited to being at the side where they do not take up as much viewing space for the majority of programs as there is a lot of horizontal space wasted in programs when viewed fullscreened (take most static webpages at 1024 horizontal pixels for instance)
doing this allows for more verticle viewing space in browsers and word processors (the majority of what i use) which is what prompted me to move all my toolbars onto the left of my screen.
this is especially efective with the windows toolbar (that damn thing knocks off almost 5 lines of text on my screen! comparing that with other toolbars soon stacks up to 10-40 lines depending on personal usage of toolbars
Of course you could also use both your monitors in eyefinity with a ATI 5XXX series card (or 6xxx but the low end cards aren't out for them yet which given the other thread of yours i'm replying to you don't exactly desire high-end stuff) and add a 3d later if need be for even more viewing area.
also your monitors should have 30cm height with that size and aspect ratio, along with a 24inch 16:9 monitor should also be 30cm height, so they would match up heights pretty much perfectly when put side-to-side so if non-matched height bothers you they'll work fine.