Sony released three new walkman players - The high-end NWZ-A860 and the NWZ-S760BT, and NWZ-E460. None of these use OLED - they all use LCD displays. This is rather a disappointment - as most people assumed that Sony will stick to OLED in their high-end players.
The A series A860 replaces the A840/A845 which used a 2.8" OLED. The new A860 has a 2.8" touch LCD. Sony hasn't released a new model in the X series - since the original X1000 OLED was announced in 2009.