This keynote was, for the most part, the antithesis of "show, don't tell".
There's really wasn't much effort to show any extensive demonstrations; or even acknowledgement of the potential barriers preventing this thing from functioning in realtime practical applications. And that's especially so in regards to the lack of games on display. I think there were more tech demos, rather than actual videogame projects shown. It's very telling telling that they don't even have a quarterly/seasonal release window, and that their internal studio doesn't have any WIP games to show. And bringing in the Game Theory person was when the keynote jumped the shark, especially he was just there to preach to the choir about the potential things you could do, rather than any personal experiences with the service itself. They could had paid almost anybody else to come up on stage and say what he did.
I think it's good that they actually have an internal first-party studio to make games for the service, the controller design is thankfully solid and not that ugly patent mockup that's been passed around (bonus points to the Konami code imprint on the bottom), and the AC Odyssey playthrough across various hardware was admittedly a bit impressive. All the positives end there though.
Maybe the on-floor demonstrations and later events for the platform will tell a different story, but I'm still pretty doubtful of the reach they are selling for this service, especially in regards to penetrating the worldwide market.