About half a year ago when the first preview appeared, I expected the features that were presented back then to be the cornerstones of the next update. It turns out that it was actually true. I have the feeling that this keynote has not added any groundbreaking things to what we already knew, besides some other small features like Facebook integration. The features are just on the minor side and have practically been transplanted from iOS. Not something I really need or look forward to, also considering that some of the features are not supported by my 2008 MacBook anyway. I think I just disregard this upgrade if it turns out that it might actually affect my performance (as Lion unfortunately did). At least the price is absolutely fair.
My biggest grief though is the lack of any iWork-related announcement. It's been a while since 2008 and quite honestly, I have lost my patience. I really like the software, but it is bugged and misses some of MS Office's key features which I had hoped to see implemented, or at least something new. I might as well go for MS Office now, with disappointment.