It's one of those things where I'm like, Ah why didn't I not think of that :D!
haha! The question we ask ourself now is: How is it possible we worked so long without it? :)
That looks very usable, although I don't have a use case.
Imagine, you are talking with someone on Skype and want to show and discuss a drawing, pdf, or website. You don't need to send files, just drop them on bench and you both see them. The other user also can add files to the bench. You both can point, draw, type. It's just like a table in a meeting room, but online :) Communication is much faster.
--Unless I misunderstood your comment which meant 'I probably will not have a use for it' :)