Given how fast the Open Source models have been able to catch up their closed-source counterparts, I think at least on the model/software side this will be a non-issue. The hardware situation is a bit grimmer, especially with the recent RAM prices. Time will tell: if in 2–3 years time, we can get to a situation where a 512GB–1TB VRAM / unified memory + good fp8 rig is a few thousands and not tens of thousands of dollars, we'll probably be good.
A few thousands of dollars plus the energy to run the system is unaffordable to most of the world's developers. Not that it is going to be the first way in which the Global South is kept from closing the gap.