We're talking about context here though. The first couple seconds of Genie are great, but over time it degrades. It will always degrade, because it's hallucinating a world and needs to keep track of too many things.
I've tried using it a couple of times, but can't get in. It is either down or hopelessly underprovisioned by Google. Do you have any links to videos showing that the quality degrades after only a few seconds?
Edit: no, it just doesn't work in Firefox. It works incredibly well, at least in Chrome, and it does not lose coherence to any great extent. The controls are terrible, though.