Pretty stunning difference here.  The one on the left is the iPhone 4.  Look at the text under the apps.  All the apps that are put out by apple have new high res icons.  It really is 4x the resolution.  I'm having a really hard time finding something I dislike about this phone.  It feels solid and expensive in my hands.  It is snappy and responsive.  The buttons are satisfyingly clicky.  The photos and video...holy cow!  I'm going to go keep playing.  :D