OP is saying GPT is the equivalent of an old Nokia feature phone. However cellphones really blew up once Apple figured out how to make smartphones broadly appealing with multi touch (prior to that you had things like Windows CE, Blackberry and Palm, but those were extremely more limited than what the iPhone delivered).

In other words the jump ahead from GPT to broadly useful AI is akin to the jump from the old Nokia feature phone to iPhone. Don’t let the current limitations of GPT color what you think AI will be generally capable of within the next decade.