This is a neat component, but unfortunately it won't do any of us much good. It has to be integrated into the device when it is built. And given how tight margins are in the ereader market, I'm not sure that manufacturers will want to increase prices so they can include a front light. And that goes double considering that cases with integrated lights are quite common on the market.
BTW, this isn't the first front light that I have seen. It's the best, but I have seen a front light on older PDAs, the HP 360LX, and an old tablet. Also, the Sony Reader PRS-700 had a frontlight. It was ugly and didn't offer uniform light, but it did demonstrate the possibilities.