From our experience, the best collaboration doesn't happen during planned meetings. It happens during spontaneous conversations and that's what we're trying to bring back.
This isn't to say that I disbelieve your experience, but it still baffles me there are remote teams out there that fail to collaborate at a sufficient level with tools that already exist. I hope Sidekick succeeds to a level that doesn't one day turn my home office into a remote version of Office Space.