The benefit of this approach is mainly that you don't need a server, so you don't have to worry about losing your curated feeds because of your server going down, and you don't have to worry about defederation politics, because each post is pulled from its source site.
Although it is controversial, I am also thinking about indexing posts and serving them in the form of a search engine and/or algorithm (kind of like the front page of Reddit/HN), and hooking this client into the service (configurable and optional of course). If you are already working on something like this I'd be curious to hear about it.
Let me know what you think.