I noticed that too. It was a sensational, unexpected, brilliant demo that made me feel wonderful things inside, mixed with reflections about the entire human race, and then it was followed by an underwhelming, slightly silly and slow presentation. It didn't fit... it didn't flow.
But on the other hand, the fact that this seemed almost entirely unscripted (the presentation) and that Sergey felt strongly enough to go public with Glass as rough as it currently is, spoke more to me about the excitement and innovation going on at Google than anything else (seriously, Nexus Q?!?). As other posters have said, augmented reality like this is the future.
