I was a part of the little give-away when the first 5mp cameras came out, I got a dome camera, when previously everything I had were 4mp bullet cams.
The 5mp is clearer, it also seems to have a "more realistic" color tone, especially when compared to the 4mp cameras side by side. I don't have it set up where it could capture license plate numbers, so I can't comment on that.
I can comment that the one I have, is not 100% reliable. It'll go out, and came back on, sometimes it'll be weeks or months in between episodes, when it does, it'll flicker between on and off for 15 minutes or so, and then stay on. It's a major PITA to change that particular camera, so I'm leaving it, I have 2 other cameras that capture 95% of the FOV that one does, so I'm not super concerned about it going down, but it's annoying, as the previous 4mp camera I had there never had a single hiccup. It's the only 5mp camera I have, and like I said it was from the very first run of 100, probably a prototype, so I'm guessing it's just that particular camera.
I will say, the other 12 4mp cameras I've had, have never had the issues of cutting in and out like this one.