The absolute fastest desktop Mac GPUs cannot beat an Nvidia laptop GPU in prefill or inference speeds. Apple Silicon is a non-entity for professional datacenter deployment and arguably unusable for frontier models at agentic context sizes. AMD is Nvidia's primary worry, and they're not doing much better in terms of GPGPU SOC compute.
You can believe all you want that the dinky little jetson boards were desktop grade when historically the ARM SoC portion of a jetson board couldn't even keep up with broadcom/rockchip SoCs. It's taken until recently for the actual arm compute portion of Nvidia SoC's to be worth a damn at all, and they still fall far behind Apple let alone the rest of the pack like Qualcomm/Samsung.
You can believe all you want that good single-core performance will corner the edge compute market. It hasn't, Graviton has more buy-in than any Apple Silicon chip ever got.