1) As I said, many people have different ideas of what we are talking about. I assume that for you general purpose AI has more capabilities, such as the ability to quickly learn tasks to a high level on the fly. For me, it still qualifies as general purpose if it can do most tasks but relies on a lot of pre-training and let's say knowledgebase look up.

2) It seems obvious to me that ChatGPT proves a general purpose utility for these types of LLMs, and it is easy to speculate that something similar but with visual input/output also will be even more general. And so we are just looking at a matter of degree by that definition.