A $16 billion refinery is genuinely massive for the region and could shift how energy flows across East Africa. Right now most African countries import refined products, so having local refining capacity means less dependence on outside suppliers and potentially lower costs at the pump once it's running. Kenya specifically has been dealing with fuel shortages and price spikes, so this could actually help stabilize things locally. The refinery would process crude oil and supply neighboring countries too, which is why Dangote is betting big on it.
On the flip side, global oil prices won't really budge because this is still a drop in the bucket compared to worldwide production. What matters more is whether the project actually gets finished on time and budget - mega infrastructure projects in developing regions sometimes face delays or issues that aren't obvious upfront. There's also the environmental angle that folks get concerned about, plus questions around whether all those construction jobs and refining jobs will actually benefit regular people or mostly line corporate pockets.
For the region though, it's probably a net positive if it works out. Kenya and neighboring countries do need energy independence, and refining jobs could help the economy. Just don't expect it to solve everything or dramatically change global markets.