Tilt shift lens with IS? What would be the point?
It's just part of the range of things they often include in patents - shows it working with any lens. Patents often show a lot of related stuff 'just because'.
Then again I use TS-E lenses all the time, quite often hand held ... yes heresy, I know;-)
I quite like the idea of just picking three points to define a plane in space, and it working out the settings (if possible) to align the focal plane. Now that's something I would be surprised to see.