The idea of the product is really great. The cost is prohibitive for all but major corporate customers.
Add in Google's track record of killing products... just like this... and why would you invest?
Jamboard needs to be a tablet companion app first, and the hardware can follow. If they're going to keep coming up with these halo products, then they need to support them for the long term. They also need to be willing to bite the bullet and give these away to lock people into Workspace because it's unique and no one else does it.
Now it's another reason to not buy in.