That looks pretty dope.
I can't see myself wearing one, but the execution looks spot on, like that is target renders and not anything like what we will actually get.
Google Now is also pretty damn awesome, for the limited things I use it for, and to be able to tie all that to home automation from your wrist also sounds like worthwhile innovation going on at Google.
Google Now: Temp 62o out, 25 minutes from home
You: Ok Google, turn on heat to 70o
You: Message Jenny - please pick up milk from store - send
I assume the watches work on Bluetooth/wifi connected to your phone for internet connection though.
This will not work if I need yet another cell contract to use the watch.