ehm... the iMac too, has a mobile CPU and GPU due to heat constraints.
iMacs use full desktop CPUs... i5-6500... i7-6700K
But yeah... they do use mobile GPUs.
And as I said earlier... that's ridiculous for a computer that's supposed to be a DESKTOP computer.
The reason they have heat constraints is they shove hot parts in a small area. And there's just no need for that.
Let's be clear... I think both the iMac and the Surface Studio make wrong choices.
They have amazing screens... but questionable components and design considerations.
Thin laptops? Great!
Thin desktops? Unacceptable...