Half the stream has been a series of sound cutouts(my favorite), stutters and freezes.
The coolest presentations that I was able to see so far were the gentleman who presented Drive Club, who gave the impression of being an fairly unscripted human being. Johnathan Blow was a nice breath of fresh air as well.
I was less impressed by all the hobgoblydock that presented no gameplay. I am no longer impressed by that at all. Knack was nice to see, as demonstrations of gameplay mechanics is of actual value to gamers. Prescripted sequences have ceased to be.
The system seems impressive. Dangerously connected to social media which I hope is optional.