[mamikonyana]

from the video: "..it only hears you when you use the wake word we chose..", so you can definitely chose "Computer" as your wake word

[delecti]

That doesn't necessarily mean that any word is an option, just that your set of options is larger than 1.

[Tyrannosaurs]

Isn't this patently false?

If it's not listening how can it hear the wake word?

[Houshalter]

Xbox and google now do the same thing. As I understand it all the sound is filtered locally for the keyword. If it's detected, then it starts recording and sends the audio to a server to be processed.

[jarin]

Now they just need a Paul Bettany voice pack.

[joemi]

That's pretty good, but it's second place to my desire for a Majel Barrett voice pack.

[pdaddyo]

Funnily enough, Google Now's voice search was originally called "Project Majel" for that reason - https://en.wikipedia.org/wiki/Google_Now#History