Is it inevitable though? Open-weight models large enough to come close to an API model are insanely expensive to run for con/prosumers. I'd put the “expensive” bar at ≥24GB since that's already well into 4 digits, which gives you quite many months of a subscription, not including the power will for >400W continuous.
Color me pessimistic, but this feels like a pipe dream.
A decent amount of software developers and gamers do spend 3000 USD on a PC. That kind of hardware is going go get more and more capable over time wrt genAI models.
Of course there will always be a gap to frontier closed hosted models. It is not an either or proposition.
Color me pessimistic, but this feels like a pipe dream.