i have not seen any evidence they are near to commercializing this. I believe that in the end it will take a series of fusion chambers and the reaction will need to migrate from the start up tokamak to the ignition tokamak and then to the energy generation tokamak and so on through cool down and eventual restart in the start up.
I have no real idea how nuclear fusion will eventually work if the technology can be harnessed but I do know a lot of money and countries are researching it and if the technology is ever developed it will be a quantum leap forward in energy production