Do they have a replacement for whiteboards and sticky notes? Those are one of the biggest things that I haven't seen a solution for yet.
That said, people could probably use tablets more systematically for sharing hand-drawn/written stuff in real time. Some of it is about adjusting to the realistically available tools as well. For large meetings where some people have to be remote, for example, we've switched things that we would have historically probably written on a whiteboard to shared docs online.