Backlight won't be an issue. LEDs like that have service lifetimes longer than your own. The switching elements in the screen burning in is another issue, but i

Backlight won't be an issue. LEDs like that have service lifetimes longer than your own. The switching elements in the screen burning in is another issue, but it seems like burn-in on modern displays (AMOLED) is a reversible hysteresis effect that you can clear out by flipping the pixels to extreme values approximately.