Yes, I agree. My dream would be to one day work on a browser and integrate Hyperclay into it. I believe web apps have been around long enough as a core web technology that browsers should ship with a local web host, knowledge of what a user and user account is, and the ability to persist to disk whatever the user chooses.

In a similar vein, it looks like there is a working group for linked web storage at:

https://www.w3.org/groups/wg/lws/

That would likely have some overlap.

If you were to have an accepted w3c proposal and working implementation in local browser forks, you could potentially chat with the browser teams to add the experimental feature first through a flag users would manually have to turn on, and then later potentially it could get integrated.