I watched this a couple days ago, the day they announced it but the one thing in which I liked the most, well other then EVERYTHING, is the following quote.
There fucking spellchecker automatically on the fly changes it to the following.
Now that might not seem great to the non-technical programmer but for the rest of us this shit is fucking amazing, they gave a few other examples of where there spell checker no longer rely's on a dictionary lookup.
This fucking thing actually takes CONTEXT into account, basically it can tell the difference between Orange the fruit and Orange the company.
Well I don't know if its that good yet but think of how powerful a program like this could be for us, its a fully functional unique content builder and one that actually output shit that is actually readable by a human.
All I can say is that yeah I'm impressed with the features of Wave.