Will using words like diminishing returns to describe current AI advancement is just silly.
Yes GPU tech is fairly mature, but GenAI is not mature at all. OpenAI just released a 4.0 mini that is supposed to be 100x smaller yet similarly performant. We just have NO IDEA what the tech looks like in 5 years... I am sure with all the money sloshing around there will be many investors that loose.
but I am also betting that new trillion dollar companies are forming now too.