[voppe]

Well damn, that is much more understandable and super interesting. Thank you!

It seems to be some sort of in-page browser tab? Let's see what that brings. (besides interactive advertising, obviously)

[hazz99]

You'll be able to implement more SPA-like instant navigation with preloading, etc.

See the list of use cases [0] for more

[0]: https://github.com/WICG/portals#use-cases

[omneity]

It's closer to Android Activities rather than tabs since you only have one you can interact with at a time and you can send and receive data from it.

[xwdv]

Why bother with that limitation?