Thing is, we could have gotten a 'high resolution' version for this game long ago had they wanted it.

What we're using is a client, all of the textures and important data, like wall collisions and such, are already on our computer/console. The only thing the server does is passing position coordinates and data like text, actions, damage and such. How the data is managed and then drawn on screen is entirely the client's work.

So technically speaking they could make a PC version that far surpasses the looks of the PS2, the Xbox360 probably could as well. But that would require going back into the 7gb of data already there, and redraw all of the pieces of gear, zones and what not, so they would be higher quality. Each piece of gear is also drawn differently for all races, so that'd be 5 (or 8 if they also count gender differences) times redrawing and refitting the equipment every time they add new ones, plus redoing the older ones.

Also, it would obviously increase the game size by alot to support both types of renditions, the new textures alone would take more space. It's alot of time and effort spent for an 8 years old game on the decline.

If they could separate the consoles like that, while at it they could also break out of the whole 'PS2 limitations' thing, but then it would also break the 'sync' between the consoles, which they have tried to preserve. The developers wanted all consoles to be equal, without one having an 'unfair advantage'. PC being able to handle higher resolutions is not an unfair advantage per say, PS2 at least has constant framerate at what it does, PC has too many variables involved in hardware and software.

Just to say that while not impossible to have a higher rendition of the game on PC or 360, I doubt they would put the manpower on doing this.