He is talking about the BTX that just been announced. From what I have seen it is a step backwards as the air enters the front, hits the CPU cooler, the heat from the CPU cooler then goes to the GPU and out.
Yeah let's heat up the hot GPU with Hot air off the CPU. That's much better.
The current ATX IMO is much better. You can easily control the air flow on a good case and supply fresh cool air to both the CPU and the GPU at the same time. BTX is also one crowded whore with little room to mod. Stricky OEM/marketing hype IMO. But we will see.