Kilack:
I can definitely see the difference with _text_ on the iphone and galaxy s. iphone seems much clearer to me in that area, my wife has the iphone 4 so ive seen plenty of it.
Interesting. You must be very young I guess, if your visual acuity is such that you can see a difference in sharpness of text on identical pages on the iP4 and SGS side by side. I've run a few informal tests with colleagues and the consensus is that there's no difference. Anecdotal, I know, but I haven't seen any empirical evaluations on the web. If you know of any yourself, post a link. That said, none of those people were under 30 so maybe that's a factor.
However, on the other hand, our kids who range from 17 to 22 can't see any difference either, so maybe genetics is a factor as well.
One thing that all have agreed* is that the colour and contrast of the SGS display is very impressive. :D
My take from what I've seen so far on smartphone screens is that the pixel pitch at 480x800 on a 4" display is fine enough for me to be unaware of its existence, and I won't get any benefit from a higher resolution on that size except maybe bragging rights. The downside will be greater power consumption via the extra pixels to be displayed and the GPU grunt required to push them.
So for me at least, there's no point in paying more for higher pixel density and I'll never make a buying decision based on a higher pixel density.
Cheers,
R2D2
*Disclaimer: With the exception of a self-confessed Apple fanboy friend who also thinks a 3.5" display is ideal and 4" is too big. I'm looking forward to his reaction when the iP5 appears in June with a 4" display. :D