If you are interested in the Web, he has some interesting points to make. But perhaps judge the material on its own merrits.
The presentation is interesting but reminds me of this presentation from Microsoft Research about limiting the trusted computing base in the "browser" while allowing a wide variety of applications to run.
Perhaps the new approach will be to use WebAssembly but there is still a large stack of Web standards implemented in unsafe native code in most browsers, with apparently only Mozilla actually starting to address that problem using a much safer native language.
Note that the embassies container/browser could run Webkit inside it.