I'm not sure. Actually I don't need most of the new features (webcam? what for?). Of course, if it's faster and/or has more memory, it would be nice, but I'm quite content with what the 770 offers now.

The real no-no with the "870" is its design: too big, too silver, too retro, too many moving parts (cam, stand), and no metal slide-on cover. Also, it seems the buttons I use most (the ones on top) are smaller and harder to use because they're not separate any longer.