How do you do video chat on the SGII though? I'm guessing you need some software like Skype, etc., which means your friend also has to have installed, you need to be friends with them, and so on. On the iPhone, FaceTime is built right into the phone app—just call your friend and press "Video Chat". No need to worry about setting up an account or downloading anything else. The only thing you need to coordinate with your friend is to make sure they have an iPhone.

Skype would probably be the choice plus you can have group video chat.

It is odd that there isn't any ready-to-go Samsung app for it (I have an SGII) or at least I didn't see one yet.

It's not a big surprise though since not all phones which use the Android OS have a front facing camera so it would be up to the individual phone manufacturers to add an app if their phone has a front camera.

Google Talk supports Video chat across a wider range of devices than FaceTime.

Why do you think that a larger screen is objectivly better? It's all about personal preference. I despise those phones with large screens.

Sure it's personal preference but the trend seems to be moving towards larger screens on smartphones in fact doesn't the very definition of a smartphone mean it has a large screen?

If it's a smartphone I would say it's main purpose is to view websites and use apps such as Facetime or equivalent which would be uncomfortable on a small fuzzy screen.

Some day we get the roll-up displays and have scroll like phones with large folding/roll-up screens.

It's about compromise. A smartphone with a one inch screen would be an obviously stupid idea, as would a smartphone with a ten inch screen. Seen that way "bigger is better" or "smaller is better" doesn't even make sense.

My claim is: 3.5 inch screens are a good compromise, allowing for comfortable browsing, reading and writing. The additional screen space would never be worth the additional bulk (also: uncomfortable one hand use) for me.

That's all about personal preference.

I think something between 3.5 and 4 would be ideal. Current 3.5 size is small for reading books(typical pdf technical book, page cropped to visible content). Even adding 0.25 inch would be a great help without sacrificing portability.

Another thing to consider is in general the screen bezels of phones is getting thinner too as the screen glass size grows, a 3.5" (88.9mm) iPhone has probably a 1/4" (6.3mm) bezel surrounding the screen.

Someone with an iPhone would be used to the "hand feel" of a 4" (101mm) iPhone if the screen bezel were thinner.