The key part here is that it is tailored for any kind of content as opposed to just text, everything you'd like to "view later".
Spool (http://getspool.com/) did this as well, with the twist that they actually scrape content (videos and all) to save to your devices to view offline. For some reason it doesn't seem like Spool ever took off.
Spool (http://getspool.com/) did this as well, with the twist that they actually scrape content (videos and all) to save to your devices to view offline. For some reason it doesn't seem like Spool ever took off.