The idea with Weave was not exactly the same as yours, but it shares the same feature that I consider the main draw: sharing tabs across devices. Weave really

The idea with Weave was not exactly the same as yours, but it shares the same feature that I consider the main draw: sharing tabs across devices. Weave really is supposed to be a platform for sharing all of the browser data (history, bookmarks, etc) across devices, but the inherent Firefox dependency and cumbersomeness of use stopped me from using it. Interestingly, at around the same time I was looking for that, I was also looking for a way to construct a digital tour such as you describe to use to show some things to remote coworkers, so I'm somewhat amused that you seem to be combining these ideas. If you did end up creating a service that let me seamlessly share tab sessions across multiple devices on different platforms, I'd be ecstatic enough. Being able to tag tabs to various sessions and be able to pull them up like that so I could easily share the sessions for my projects between my work devices without bringing in, say, my HN tabs would just be a dream.