HTC already has phones out with better quality displays. The S4 will have a revolutionary display as well. Retina is a term used and marketed by Apple for a display with a very high pixel density. In other words there is no such thing as a "Retina"...
Not a popular post I'm sure, but it is true. The HTC One X has the best quality display on the market. It is better than the iphone 5 display.
I do not know why HTC has such a poor market share, but it is NOT b/c their phones suck. They are the best engineered phones on the market today. The One X is tough as nails and bests the iPhone 5 in many areas.
Do we need retina + resolution? Nope