It's not he fact that it exists really, everyone knows it's being tested, but the fact the writer claims it's almost exactly like the Google video is more significant.
It's not like the promo video they released a while back, which was much more immersive and offered a lot more features.
The (for example) skydiving video seems much more realistic in terms of capabilities, though. Some of it does seem nonsensical, like having a hangout while on a plane--how's that connection supposed to work? Elements like that make it a bit more fantastical than real.
I agree that most of the features shown already exist in nearly identical form on Android phones, so it's not like those are outlandish.