I don't care much about playing games on three monitors simultaneously; I just want to make the jump from my current standard dual monitor config to one with three monitors, where I can play games at fullscreen on the middle monitor and whenever I maximize a window in any of the monitors it will expand to that screen (I don't know how you call this mode, but it's at the OS level and it works for two monitors without the need of any special drivers ). Also, when all windows are collapsed, it will display the desktop icons on all three monitors. It's just the regular mode (where you do NOT fake to the OS that you just have one monitor) "You can set resolution, size, and position of the monitors independently, and windows can intelligently size themselves to each desktop on each monitor." (quote from codinghorror)
But isn't the term Eyefinity constrained to the Display Group (where you fake Windows that you're using just one display, but are in fact using three) or cloned modes? Shouldn't the regular OS mode that almost every dual monitor user uses (described above) still work? WinXp users have been using >=3 monitors for years now (via additional cards) - howcome it's not supposed to work out now?