logic
he has a pda with 640x480 res
+Jobs say highest res
= guessing of iphone with res higher than 640x480, which is next? 800x600 or 1024x768!
hehe, actually quite reasonable.
Not really, since 160ppi is already quite dense. What's the point of more density? At 160ppi you already start to lose "pixel" sense at normal viewing distances, allowing for a very smooth look. Anything higher is just more stress on whatever graphics chip they have in there, which = more power consumption.
I'd say the interface is plenty high res for how small the screen is.