That makes me believe we're not seeing gameplay..
Surely that WOULD mean that we are seeing gameplay? Why would he have a playable build with him at Magic otherwise?
Did you read his reply tweet?
This one? "I am playing it now, but I do not know for you guys..."
Maybe he is try to trolling us a bit and tomorrow they show actual gameplay. English is not my native language and maybe I don't get the message. :-k