I like the OLED screens too. They have a superior black level (well actually LCDs have a grey level really), response time, viewing angle, color saturation, more even colors (LCDs tend to be un-even due to the position of the backlight lighter on one spot, darker in others).
As you say if they wear out over time you can always replace it. The pixel plague effecting the Wiz is probably due to GPH using crap screens that de-laminate. That is not standard with OLEDs. They should only be fading after allot of use, not rotting after a few months. Even so the crappiest OLED still looks better than the best LCD.