I'm interested, I just wish the announcement had been a little more specific
I've heard that you'll be sorted and receive a unique wand (out of over 30K possible combinations) and will be able to "experience Harry's 7 years at Hogwarts" in a "new, interactive way." I still have no idea what that means, heh.
It sounds like she's released tons of new details and backstory about Harry's world, and other people will be able to add on? Like sanctioned fan fiction? No idea!