1080p performance even if gaming is important to users of these systems means absolutely nothing.
When you move past mainstream anything could happen, 2-3 way Crossfire/SLI, 1080P@144hz, 2K@144hz... anything, dismissing the issue does not work.
Speaking of SLI/Crossfire, any tests with TR? That whould be interesting to see as PCI-E lanes are tied up to diferent dies.