Thank you both GameTrigger and Letrico.
I thought so that it could be like that, that labelling the voltage depending on region is just for fulfillment law requirements or even to notice customers what voltage they should connect their console to.
Producing different models with different voltage would just increase the manufacturing cost plus they would need to know in advance how many pieces from total of 12300 they intend to sell to which region. A bit nonsense
So it seems that only obstacle is playing DVD and Blu-ray discs across the regions since they are locked.