Being a huge fan of electronic readers, I could not pass this up. This is a leaked video of Doom 2 running on "PocketBook 360 Plus" prototype, recorded by a PocketBook employee. To be precise, it's running PrBoom - a Linux port of the original game from id Software.
This looks pretty amazing - the FPS seems really nice for an e-ink screen.
UPDATE: I've just dug up that the e-Ink screen model being used on this device is "e-Ink Vizplex V110". Full device specs: