I didn't know about Google voice search, but I am betting it was just a voice interface to a normal search. Nothing like answering questions, keeping contexts, etc. like they were advertising today. Siri, however, started out like that from the beginning.
But for so much resources and combined talent, I would expect more than new sets of emojis. They way they were dishing it out was as if they brought peace on earth. Honestly, I would have felt embarrassed to mention it even in passing. (And what was with all those jeans and dress code in general?)
Also, if you are copying Apple and Amazon, which are known for their attention to detail, how about improving things a bit? At the end of the voice demo, the app purchases the tickets (without showing prices, locations, times, etc. (and how do I set up those in the first place?)). Now, the kicker: the phone displays a QR code and asks the owner to show it at the ticket counter at the movies. Himmm.... Really? How about skipping that too and just buzzing/vibrating/texting the user with that info when actually at the movie theater? After all, they spent a whole lot of time talking about context awareness, location awareness, NLP processing, etc. Didn't Siri do this much years ago?
Anyway, too many other things like that. I don't have time to list them all. I am just saying that a lot of people expected something more, and more cohesive.
Can you really not think of anything better? Let's put it like this, if you had billions of dollars to create something new, what would you want to create?