That's pretty cool. Basically Siri/Google Now in a tube. I always toyed with the concept of hooking up a wide field microphone to my tablet for stuff like that but never got around to it. I suspect it results in some humorous results when it misunderstands you, just like the phone versions.
On a different angle....
Just remember that I'm very willing to bet that it's doing data collection from your queries. Expect to see more "customized" amazon.com emails in your inbox. Similar to the deal Amazon struck with Ubuntu where Amazon based "suggestions" start to pop up in your "lens" queries.
Useful for some, a privacy concern for others. Depends on your perspective. Everything else is watching you anyways. What's one more set of eyes?
