I'm not saying an omni model isn't useful for HCI - essentially my problem is that these demos seem to be highlighting the model's ability to interrupt the user

I'm not saying an omni model isn't useful for HCI - essentially my problem is that these demos seem to be highlighting the model's ability to interrupt the user (which is almost always not a good thing), it's ability to keep time (which should be a non-issue really), and it showcases these using fairly lame use-cases.