I switched from the HTC One which had the most amazing screen. The Moto X is fine by all means though, it's vibrant and clear and 720P is more than adequate. I think I'm a sucker for AMOLED as well, the blackest of blacks, I'll never go backs. I've owned a GNex and a Note 1 and I feel this AMOLED is calibrated very well. Not quite as cartoony looking as my brother's Note 3.
Currently Rocking: Xperia Z Ultra + iPhone 5 + MacBook Air 11 2014
Gone Baby Gone:iPhone>iPhone 3GS>iPhone 4>Gnexus>Note i717>HTC One>Moto X>LG G2