The Jamboard may be superior but the Jamboard doesn't exist as an actual product. We have no final demos, no release date (except "2017"), no specs, and no prices. When the Jamboard ships, only then can we draw decent comparisons.
Yeah, but it's Google. It feels like at least half their products that are announced with big fanfare either are never released, or released and then scrapped after just a couple years (Code, Wave, Code Search, ...).
Similarly if you hype before release and deliver, you will never be able to meet the hype that you set yourself and that will lead to failure.
For example, my employer got to taste pre-alpha .NET, back in the day.
It's been over 10 years since Docs and its shocking how businesses haven't started using it. MS is trying to imitate those experiences but 365 in a browser is still painful.
The fact that you need an app to connect to Surface is so alien in my universe.