This is far more interesting news to the A/V tech and Show production community than to the gamer community. This allows multiple screens to be run off a single rig with a single or cross-fired enterprise card setup that would otherwise have required two. The FirePro 9100 with 6 1.2 Displayports comes to mind. Being able to run 24 simultaneous 1080p @ 120HZ screens with 6 Displayport 1.3's (or some equivalent combination) can be very useful in a lot of applications. Big projection projects, Show production that has multiple highly time senstive video cues on a number of different screens, etc.
The options now are quite expensive (even relatively speaking), require shifting between too many connection formats (and often bottle necking quality) or using very expensive purpose built DNC/SDI platforms. An HDMI matrix with a computer control interface will usually run at more than a couple times the cost of the rig itself and there will potentially be an inherent lag built in. Running multiple rigs means multiple technicians and therefore higher costs, more space requirement and exponentially greater risk for coordination related errors.
Basically there is a massive gap in show scale production costs. Once you pass 12 screens @ 1080p, your costs at least triple while they stay somewhat steady per screen between 4 and 12. This is almost entirely due to available hardware output ports and not necessarily the cost of processing power. Now the scaling smooths out up to 24 with a jump that isn't unacceptable because other investments will have to be made per screen along the way anyway.