It's only been three years since AI Dungeon opened my mind to how powerful generative AI could be, and GPT-4 blows that out of the water. Whatever gets released three more years from now will likely blow GPT-4 out of the water.
AI is already considerably smarter than the dumbest humans, in terms of its ability to hold a conversation in natural language and make arguments based on fact. It's only a matter of time before it's smarter than the average human, and at the current pace, that time will arrive within the next decade.
All useful technology improves over time, and I see no reason to believe AI will be any different.