Note that they're just isolating blood flow. They're not taking the brain out and putting it in a fancy jar.
Not totally clear how this is different than a heart and lung machine that they use during major heart surgery. Sounds like this is mostly an improvement on that, they talk about it replicating the 'pulse' of a heartbeat for example.
All the activity in every zone I visit really does just feel so great. There's no better sign a game is alive and healthy. It was totally that which hooked me.