Or perhaps if literally anyone can make a great product, then the true successes will be either those are genuinely innovative, disruptive and have first mover advantage, or those that are one of many but gain better adoption through better marketing. Or perhaps some ideas (anything involving hardware) need capital anyway.

Which isn't actually different from today. We've just shortened the time to get your MVP to market. Rather than having to raise some seed and hire devs, you can do it with an AI in a few days perhaps. Everything after that seems it would be the same.

I currently expect that near-future version of the current type of language model — no major new breakthroughs — will be able to do just that.

I also expect, as you say, for this to create a lot of competition and increase the minimum quality that customers demand such that… heh, just realised, "Make Uber for bicycles" is basically going to be the next generation's pre-interview coding challenge to screen people that can't use AI effectively.