Right, this seems to me to be a tiling window manager with a touch interface. This is kind of an odd combination too, because most tiling WMs are keyboard oriented, whereas most non-tiling WMs are pointer oriented. Maybe that's just historical and doesn't really make much of a difference though.

But with i3, I have keybindings to "open the last browser window i used" or "open the last gvim window i opened." I can tile them in different workspaces as I please extremely efficiently and quickly, and move them around as needed. I can move much faster using the keyboard than when I'm in my Windows machine. Having this tiling ability on a tablet seems odd to me.

I am kind of getting tired of the "attacks" on the traditional desktop interface. People just don't want to admit that just because tablets exist they are not a superior interface. Just a different one.

The interface they propose is beautiful but it would really have to walk a thin, thin line between usability and screen space.

I do like the idea of a tag-based filesystem though. Obviously then you get into the problem of managing your tags (a tree-based filesystem solves this problem naturally).