I like the idea of having something flexible - imagine a roller blind that lights up. In the daytime light comes from the window, at night time it comes from the blind.The OLED light panels look very promising.
Its a nice idea except that in most houses the windows are actually poorly positioned to light rooms (for obvious structural reasons), might be more viable to spread it around more. They are talking about being able to ink jet spray the stuff onto flexible sheets, - Right, I want a matt white roll of it with self adhesive backing large enough to cover an entire ceiling please...
The ESL stuff looks like a mini CRT lamp, be interesting to see one in real life.