Text Expansion (Arpeggios)
So on other operating systems, you might be able to type "hw+[space]" and it would erase your text and expand to "hello world". I have no idea how the UT keyboard interacts with the OS but this would be some kind of program that would monitor everything you type to search for user-defined patterns to then erase the text and replace with whatever the user defined. I don't think this currently exists but might be a nice enhancement-feature to add eventually.
Chorded Keyboard: Modifiers
Someone in another post mentioned it might be nice if a proper keyboard was created with control and alt keys like for thumb typing in terminal. I noticed while writing this post that on the keyboard, there is a feature to hold the key down and swipe up to select between a few choices. It would be interesting if you could swipe up on shift to control or alt keys (as a "sticky") and then select a letter to form a two-key "chord". Or also perhaps if the user could define more of the choices available, and you could hold down a key and swipe in all directions to choose even more choices (rather that just swiping up).
Chorded Keyboard: Anything
Or, I was wondering if it was possible to code other "chorded" entries, like if you hold down shift and hit "a", it outputs "A" and releases both keys, or if you held down "hw" at the same time and released it, it might output "hello world" (if you wanted it to do that).
In portrait mode I might be able to get three fingers to chord an entry at once, or in landscape mode even more (six fingers if it is laying down, maybe four-five if holding it with one hand). This would be utilizing some kind of multi-touch properties of the devices.
Also, I don't know if this runs in Libertine containers or could run on UT, but the Open Steno Project has a program that takes chords in their stenography shorthand combinations and outputs the corresponding defined words. For instance, someone hooked up a steno keyboard to what I assume is Android to type in a cigar box - I think it would be cool to see on UT eventually, if it doesn't easily work at present.
What do you think? I can try to expand on the above if it wasn't clear.