The future of GPT could be like a construct, or an AI embryo. Something you can purchase that will consume every piece of data you have ever produced - every text, comment, journal or blog. Then it will consume every piece of data you have consumed - every book, movie, song or headline. An AI that can be taught to respond as if it believes what you believe and loves what you love. Something that can be a convincing copy of you to represent you to the outside world.
People who only interacted with you online might never know the difference.