Well, I can imagine putting my PC screen right in front of center of wall like they have. And then use super cheap, low resolution projector to show actual data from rendering. GPU would render screen viewport at required screen resolution and then it would render those extended areas at much lower resolutions. (Matching that projector.) Projector leaving area of screen black to prevent undesirable illumination of screen surface. What MSI? What Ubisoft? I can't hear you loud enough. What did you say? Ah right, very quietly that you can't match it. Lovely, Someone games on 1440p and then rest of the wall is rendered at 720p. Only VR could beat that experience.