Hm… Not directly related but you reminded me of things that I would love as creature comforts for my perfect device.
Stylus supported device using wacom’s EMR stylus support, like samsung devices have; The ability to use a TW in place of outlook (setting calendar events, contacts, timer/alarms) that can be sync’ed with other email clients, and to keep a local copy that sends a copy of updated changes to the cloud for backup, a more mobile friendly UI (which can be remedied with a plugin, so this isn’t really needed in mentioning.)
and I also would enjoy an infinite canvas / ZUI layout for TiddlyWiki, and think that’s a cool idea.
Not sure how well it would work on mobile, but it would be neat. Maybe as a view mode. Like how @linonetwo’s tw-calendar plugin works, where you could change view modes from canvas to calendar to storyriver etc.