The short answer is yes, but not with the hardware you mentioned. As display technology matures to the point where manufacturing large screens is as efficient as smaller screens (think OLED or SED), a th2go would not be needed. But we're talking about years from now, like 5-10.
Right now the aspect ratio is what makes the triplehead work so well (15:4), but in the future it will be more important for game engines to allow for custom fov's to work properly with concave screens. Currently this ussualy not a problem but many games are still locking the ability to adjust this (BF2 and R6:Vegas come to mind).
I agree that the ability to modify FOV is extremely important for widescreen gaming.
Matrox seemed to have little if any success getting game companies to make this a priority back in the Parhelia days. In fact, I think I remember them pulling there game developer liason off that responsibility at some point.
Has this changed at all with TH2Go? Any idea if they are making headway?
I'm VERY excited about games using the new Unreal 3 engine or games like STALKER and Bioshock. I'm hoping that ultra-wide + FOV changes will be easy.