Quoted from HighVoltage:That's making some pretty big assumptions: I'm skeptical that just hooking up two of those displays that it would magically extrapolate a 128x32 signal.
Even if it did, that's not going to magically increase the resolution either: the source is still 128x32. What does it matter if one dot is now displayed as 4 pixels? If it worked, it'd be a similar effect to switching from Dots XL to Tile on a ColorDMD LCD.
Among others, the question you'd need to ask is "where do I get high res DMD graphics for LOTR?" Answer: nowhere. You'd have to create new source graphics like CGC does with their remakes.
The P number is just the led pixel pitch ie 2 = 2mm 3 = 3mm just need to make sure the resolution is 64x32 so 2 panels will create a 128x32 pinball dmd, also noting you usually need 16 line scan (Not 32) and hub75 (as few have some other weird pinout)