I might agree or disagree depending on the details. Lower latency? Yeah, CPU wins easily. 4k resolution 2D composition? Well, GPU is pretty likely to win this

I might agree or disagree depending on the details. Lower latency? Yeah, CPU wins easily. 4k resolution 2D composition? Well, GPU is pretty likely to win this one... CPU has pretty low latency, easily better than what GPU can achieve. But on the other hand GPU has insane bandwidth, high degree of parallelism and hardware ROPs.