Something like this: https://www.youtube.com/watch?v=FCUi_dRU0tY

That looks incredibly unpleasant (to me), makes positioning the cursor like slipping over oil. I prefer the discrete jumps that the cursor makes :)

When you type a character, the cursor smoothly animates from its previous position to the new one. As opposed to most apps where the cursor instantly jumps one character width to the right.