So, this is largely geeky - but we're sure we can tie it in somehow to PSP2 - it's Sony rollable OLED screen. What does that mean? It means it's a screen that you can roll around a pencil.
The techie details are that the screen is, "a super-flexible 80 μm-thick 4.1-in 121 ppi OTFT1-driven full colour OLED display which can be wrapped around a thin cylinder..
"To create the display, Sony developed OTFTs with an original organic semiconductor material (a PXX derivative) with eight times the current modulation of conventional OTFTs. This was achived due to the development of integration technologies of OTFTs and OLEDs on an ultra-thin 20 μm thick flexible substrate (a flexible on-panel gate-driver circuit with OTFTs which is able to get rid of conventional rigid driver IC chips interfering roll-up of a display) and soft organic insulators for all the insulators in the integration cuircuit."