I remember the first editions of VMworld: technologies like vmotion and FT made you just standing still thinking "WOW!".
That "WOW factor" had faded away in later editions: virtualization technology is now a consolidated thing and I've not seen anything really breathtaking.
The last two editions were really all about the cloud (yawn!) and just some other little incremental improvements.
Finally, I saw something that could bring a revolution in the way virtualization clusters are built:
SimpliVity Omnicube and Nutanix Complete Cluster.
It's WOW time again...