My 2 cents:
I would have to say that this screen is of a higher technology (in terms of LED's and construction) than Popmart, but may in fact end up being the same resolution. As the LED's in Popmart can be seen as individual light sources, the LED's here are bundled in premanufactured modules. Now it is my assumption that these Barco modules are made to be put together in any configuration to make any shaped screen, but the designers were probably going for a lower resolution for the cost they had to spend.
I mean if the screen cost them 5 million (let's just say) and the modules are spaced pretty evenly with an equal space between them, it would go up by a factor of at least 3 if the modules wer added between and above where they are now to create a "full" screen. This would bring the cost to 15 million. In real terms - if the screen is costing them 10 million, that would translate to 30. They probably had to give a little in resolution to get the sized screen they wanted for the cost they wanted to spend.
I just wonder how big the screen would be with the modules they are using now if they were put together snug. I guess half as wide, and half as tall - still very big.