I know it won’t be the UK and Europe as leaders, and probably not the USA, you only have to look at who is leading the World technologically and economically and production wise. It may not necessarily be Hyundai though, it could possibly be a Chinese company (with a projected 2billion population – compare that to the UK of 60 million, with the EU half that of China).
I think you may also get a two-tier system developing with Europe/UK v China/Asia; with the best models with the best technology being in China/Asia. We can see with the allocation of models by Hyundai to Europe of its Ioniq 5 – it was about 3,000 models to the whole of Europe; Europe is not seen as a large market or worth the hassle and as the incomes grow in China and Asia then they will have more buying power to justify companies focussing production in these new areas.
Europe will probably keep trading barriers high to protect its own car industry, which will not be able to compete with the likes of China in 10 years time. Germany has only marginally been capable of competing due to it being in the Euro.