Interesting demos.
The browser layout engine and TW layouts are completely different things. The library will not help us to create impressive TW layouts. It can help to animate text.
The demos are nice but I did not see a single thing of value, for our usecase. The performance problems some of our users have, has not much to do with the browser layout engine. It has to do with ultra long lists of tiddler links, where the generation of TWs JS event handlers is the slow part.