This looks to me like an evolution of tiling windows manager with a flair of mobile/touch. Something makes me think that windows and macos are both headed in this direction in the long term.
I've also considered a tagging system for links - bookmarks are honestly far too much manual management - I'd like a quick hotkey and a tagging interface possibly hooked up with a calendar. I'd be even better to group context from multiple sources such as emails, calendar events, web links and chat protocols so that for my 3PM meeting it could load a screen with all the context I need, allowing me to set up tasks beforehand.