Apple could use OLED screens in the following devices, at least this appears from the information provided by certain sources that claim that Apple has sent several job offers to employees of companies specialized in the production of such screens. Until now, Apple had job offers listed only for people specialized in working with AMLCD screens, but it seems that the company intends to use OLED technology in the products that would be launched in the near future.
TFT device development & optimization on glass or plastic substrate
TFT backplane process integration development for LCD or OLED displays, including LTPS backplanes
Thin film deposition process development and characterizations
Photolithography and etching process development, including coating, developing, etching, stripping
Color filter process development, including black matrix, color resin material, coating, developing and ITO sputtering
Panel design & layout experiences in TFT device, TFT LCD circuit and SPICE simulation
Organic EL material & process and associated optical, power & reliability characterizations
LCD cell process development, including alignment layer material, rubbing, LC fill, sealant
Active-matrix backplane design & optimization for LCD or OLED applications and associated circuitry simulations
LCD or OLED optical characterization and overall design optimization
Apparently, Apple is looking for people with experience in the field, that is, people who have worked with this technology so far and have solid references from the companies where they worked. Apple has been reluctant to implement this kind of technology until now, but maybe in future iDevices we will see much more economical and much cheaper OLED screens.