What is all the hype around Blazor in .Net Conf,
Have not seen anything special except these boring demos and presenters and the fact that it will be based on Web Assembly. Has anyone caught anything exciting other than that!

Business logic shared between front and back end, websockets, cross platform, uses a stack tons of people are already familiar with, corporate backing.

It's all been done, but maybe not all together.

Blazor offers a wide array of possibilities, especially once all parts of it is ready for release.
The fact that you can now write a fully featured application that will work in any browser on any platform and beyond, all in a completely structured, type-safe and managed framework is a monumental achievement. And it can also be hosted on any platform to boot!
It is everything every other attempt at a common browser app platform should have been, and so much more.
In the immediate future, it will not replace JavaScript for every use case. But it is the first framework that really, truly has the potential to do that in the long run.
Not nearly everyone will ever adopt it of course. But it will lead the way for the other major tech players to create their own versions of the ideas behind it.