I hope it does not involve typing on a keyboard. Typing on a keyboard is so millennial, and holds back innovation, such as everybody solely using touchscreens in closed walled gardens. I hope the future is an llm that has access to all the context of our lives and then presents 4-5 such different keywords, and you just tap on the ones you want to use for the email. Once the llm is sufficiently trained, the last step can even be skipped and lead to the most seamless and obstruction-free email user experience possible.