Moreso than blotches (which my Vita barely has) - am I the only one concerned with blue color degradation of oled tech? Seeing blue is a primary color and all? I researched this trait of oled's prior to February launch, picked up my unit on launch and it's super crisp, well the replacement unit is (exchanged for one without vertical lines) - but over time, is this a worry to anyone?
"The biggest technical problem for OLEDs was the limited lifetime of the organic materials.[56] In particular, blue OLEDs historically have had a lifetime of around 14,000 hours to half original brightness
(five years at 8 hours a day) when used for flat-panel displays. This is lower than the typical lifetime of LCD, LED or PDP technologyeach currently rated for about 25,00040,000 hours to half brightness, depending on manufacturer and model.[57][58] However, some manufacturers' displays aim to increase the lifespan of OLED displays, pushing their expected life past that of LCD displays by improving light outcoupling, thus achieving the same brightness at a lower drive current.[59][60] In 2007, experimental OLEDs were created which can sustain 400 cd/m2 of luminance for over 198,000 hours for green OLEDs and 62,000 hours for blue OLEDs.[61]
Improvements to the efficiency and lifetime of blue OLEDs is vital to the success of OLEDs as replacements for LCD technology. Considerable research has been invested in developing blue OLEDs with high external quantum efficiency as well as a deeper blue color.[63][64] External quantum efficiency values of 20% and 19% have been reported for red (625 nm) and green (530 nm) diodes, respectively.[65][66] However, blue diodes (430 nm) have only been able to achieve maximum external quantum efficiencies in the range of 4% to 6%.[67]"
http://en.wikipedia.org/wiki/OLED
I do love the sumptuous display, I just hope a few years down the road it will look as good as it once did/should...