>>418459926
They're marketing it as a SteamVR headset with full support for games, I don't see why they wouldn't advertise the full FOV when other headsets use it as a selling point.
Smaller FOV also gives you higher PPD, which is nice if you're using the headset to watch movies. If that's the intended use case, it would make sense, although I can't see anyone spending $1000 on a headset plus a few hundred more on controllers and base stations and just using to watch movies.