On Tuesday, Google showed off the future of Gmail at Google I/O: the ability to question email threads and even command it to perform tasks in the background via AI agents. It’s an important evolution, one that recognizes that the reason Gmail became so popular is because email is intrinsically complex, with questions and replies and attachments all over the place. Google is using its Gemini AI search to help make sense of it all. But — and this is a big but — this isn’t here yet. It will roll out in Google’s Labs workspace this fall. And even then, consumers will have to pay a whopping $19.95…