Ink&Switch have 6 papers out on their site in the last 9 months. Each is a thorough review of an interaction style through a product they develop. Since they are an independent research lab their papers are much more approachable and fun than other, say, CHI or UIST papers I've read. These papers come off the back of 2+ years of research. Each of the individuals on the team have awesome backgrounds and Ink&Switch serves as a great starting point to do some backwards internet research if you want to see some wonderful design work. I look forward to anything else they will put out, I've skimmed each paper and thoroughly read 2.

As to Capstone itself, it seems to me a wonderfully simple tablet interface. After rolling it around my head for a while I can't believe we ever ended up with grids of icons and widgets as the "desktop" of modern touch based devices. This nestable 2D canvas scheme (don't miss the jump links, no you aren't "trapped" by this scheme) feels intuitive and affords much power to the user that they can be fine to ignore or learn at their own pace. I find that reading these papers has influenced my desire for breadcrumbs on my tiling wm laptop setup in a way I can't currently figure out but I am making small progress.

I've long been interested in OneNote. None of the other major note software systems have seemed as good. I still, however, use vim and paper. This seems like a tool that could blow OneNote out of the water. A user could build OneNote's UI in Capstone in what looks like a little bit of minor fiddling. If OneNote is a modern take on paper, Capstone is a modern take on screens.