It's not clear how app engine is really helping here... or is this just something he mentions as a theoretical possibility? To make use of all of those cpus I'

It's not clear how app engine is really helping here... or is this just something he mentions as a theoretical possibility? To make use of all of those cpus I'd think he'd need to distribute the load using the task queue, or if necessary, multistep fan-out / fan-in with the help of the pipeline library.