From Note II to OPG ? Is it worth it?

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http://forums.androidcentral.com – Current Note 2 owner here. I was in the AT&T store checking out the S4 today and saw the OGP wow, what an impressive screen. I didn't realize how much nicer and sharper the screen was compared to the Note II. Other than that, I am not sure if it would be a worthwhile upgrade for me. So what is there about the OGP that makes it much better than the Note II ? And should I get it or wait till the Note 3? (HowTos)