I can see Arc somewhat doing this with their "boosts" feature. I imagine they will eventually have something like a marketplace for these, e.g. youtube/twitter

I can see Arc somewhat doing this with their "boosts" feature. I imagine they will eventually have something like a marketplace for these, e.g. youtube/twitter without the distracting sidebars. But to your point the core browsing experience would remain the same. Would be cool if they opened that up to variability though.