This is an interesting way to coax contextual metadata from senders. However, for certain senders I will always respond promptly and thoughtfully, regardless of message formatting. Senders such as friends, family, clients, etc. Which makes the auto-reply a bit tricky:

Thank you "motherpowers" for sending the email titled "Happy Birthday" to "leepowers". For a faster response time please re-formulate your birthday greeting as a series of yes/no questions and re-send.

So being able to whitelist senders would be a requirement.

My dream is that in a few months I will open my Inbox Pro app in the morning and answer 20 Yes/No questions using just my left thumb...

I'm not sure what this would accomplish. Reading and comprehending email is not difficult. The difficult part is thinking through an inquiry and responding intelligently. "Can we move up the launch date a week?" This is a yes/no question that anyone can understand. But actually exploring an answer to this question can require considerable mental effort. There's very little utility in having this message display in a slightly different format with a checkbox.