Meaning it will hopefully maintain 60fps during very intense situations, unless the weak CPU runs into too much workload. If a modern competently programmed PC game has a 30% surplus on the GPU during a normal workload, and the CPU is keeping up with demand, then then a constant framerate is virtually guaranteed as well.
Guess he is saying this because the core audience is ignorant to basic concepts with regards to power requirements and it sounds really good while they are buying a gimped PC.