The refactored keyboard in test_apps/demo-keyboard does dynamic hit target resizing based on the predicted next character. But it is static in time. It should be changed to be time sensitive so that when the user types really fast, the hit targets are really big, but they shrink as the user slows down. So that really common words can be typed very quickly and sloppily, but uncommon words can still be typed correctly if the user slows down and is more accurate.
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