Yep, that's a big difference between LCD and CRT. In short:
-If you want to use a different resolution than 1680 x 1050 the image will have to be scaled, which is bad due to the poor scalers that PC monitors use.
-If you have an Nvidia card you can get the card to do the scaling which will preserve the aspect ratio and be better quality than monitor scaling.
-If you have an ATI card the image will always be distorted unless it's 16:10.
-If you have a HP w2207 AND the signal has a smaller aspect ratio than 16:10 you can let the monitor do the scaling without AR distortion. This function is broken for AR > 16:10 though.
-Connecting external devices like PS3, Xbox 360, HDTV decoder etc. is a no no for all 22" screens as they will all distort it.
-DScaler will be fine as it doesn't rely on any other hardware to do the scaling. It even has a nice black bar detection setting that will automatically zoom in on widescreen broadcasts.
So basically, if you care about AR, 22" may not be the perfect solution. If you don't give a ff, like most people, the Samsung should be fine.