First, it's getting a 10.5" big brother, and it has all the same features with 50% more screen. The other model (at right) has the same 8" screen as the original and is designed to fit in a 3 ring binder, and I'm sure it's going to be a hit this fall. They're going to ship in July, and you can pre-order now.
There's also going to be a model due out this Fall, and it will add a feature that I've been wanting ever since the Boogie Board hit the market last year. It's going to let you save the screen contents, rather than simply erase them.
The idea behind the Boogie Board is that you can write, draw, or scribble on it with a stylus or your finger. The screen will hold the contents without using electricity. When you're done writing, you click the erase button and the screen is cleared (this part requires electricity). It's something like a high tech etch-a-sketch.